Incumbents defeated in state legislative elections, 2010

Last updated on November 18, 2024

There were 6,127 state legislative seats up for election on November 2, 2010, in 46 states. This page analyzes incumbents defeated in those elections. An incumbent may be defeated at two points in an election cycle: during a primary and during a general election.

In 2010, 611 incumbents lost their re-election bids: 495 in general elections and 116 in primaries.

On this page, you will find:

• Incumbents defeated in general elections
• Incumbents defeated in primaries
• State-by-state breakdowns

Incumbents defeated in general elections

In state legislative general elections, 495 incumbents lost to challengers, 10.2% of incumbents running for re-election.

In 2010 general elections:

481 Democratic incumbents lost, 17.2% of the 2,803 Democratic incumbents who ran.

12 Republican incumbents lost, 0.6% of the 2,040 Republican incumbents who ran.

Two minor party or independent incumbents lost, 15.4% of the 13 minor party or independent incumbents who ran.

In 2010

Click [show] on the table below to view general election incumbent defeat statistics by state in 2010. Hover over column headings to learn more about their contents.

State legislative incumbents defeated in general elections, 2010
State
	Democratic			Republican			Total
	Filed	Def.	%	Filed	Def.	%	Filed	Def.	%
Nationwide	2,803	481	17.2%	2,040	12	0.6%	4,856	495	10.2%
Alabama	65	21	32.3%	47	1	2.1%	113	22	19.5%
Alaska	22	2	9.1%	23	1	4.3%	45	3	6.7%
Arizona	19	6	31.6%	28	0	0.0%	47	6	12.8%
Arkansas	41	6	14.6%	22	0	0.0%	63	6	9.5%
California	44	0	0.0%	18	0	0.0%	62	0	0.0%
Colorado	37	6	16.2%	26	0	0.0%	64	7	10.9%
Connecticut	123	13	10.6%	44	0	0.0%	167	13	7.8%
Delaware	31	2	6.5%	16	1	6.3%	47	3	6.4%
Florida	40	5	12.5%	55	0	0.0%	95	5	5.3%
Georgia	84	2	2.4%	108	1	0.9%	193	3	1.6%
Hawaii	51	1	2.0%	6	0	0.0%	57	1	1.8%
Idaho	19	2	10.5%	71	0	0.0%	90	2	2.2%
Illinois	75	7	9.3%	50	0	0.0%	125	7	5.6%
Indiana	56	10	17.9%	55	0	0.0%	111	10	9.0%
Iowa	63	18	28.6%	42	0	0.0%	105	18	17.1%
Kansas	44	13	29.5%	66	0	0.0%	110	13	11.8%
Kentucky	67	7	10.4%	42	1	2.4%	110	8	7.3%
Maine	90	19	21.1%	49	1	2.0%	139	20	14.4%
Maryland	114	2	1.8%	37	1	2.7%	151	3	2.0%
Massachusetts	150	10	6.7%	15	0	0.0%	165	10	6.1%
Michigan	40	9	22.5%	28	0	0.0%	68	9	13.2%
Minnesota	120	34	28.3%	55	0	0.0%	175	34	19.4%
Missouri	53	12	22.6%	49	0	0.0%	102	12	11.8%
Montana	33	9	27.3%	40	1	2.5%	73	10	13.7%
Nebraska	10	1	10.0%	10	0	0.0%	21	2	9.5%
Nevada	17	2	11.8%	8	0	0.0%	25	2	8.0%
New Hampshire	174	88	50.6%	137	0	0.0%	311	88	28.3%
New Mexico	43	7	16.3%	22	0	0.0%	65	7	10.8%
New York	124	10	8.1%	59	1	1.7%	183	11	6.0%
North Carolina	83	20	24.1%	63	0	0.0%	146	20	13.7%
North Dakota	24	12	50.0%	33	0	0.0%	57	12	21.1%
Ohio	46	13	28.3%	40	0	0.0%	86	13	15.1%
Oklahoma	40	6	15.0%	62	0	0.0%	102	6	5.9%
Oregon	43	4	9.3%	25	0	0.0%	68	4	5.9%
Pennsylvania	101	9	8.9%	106	0	0.0%	207	9	4.3%
Rhode Island	79	4	5.1%	8	0	0.0%	88	4	4.5%
South Carolina	48	3	6.3%	58	0	0.0%	106	3	2.8%
South Dakota	25	9	36.0%	44	0	0.0%	69	9	13.0%
Tennessee	54	13	24.1%	49	0	0.0%	104	13	12.5%
Texas	71	21	29.6%	80	0	0.0%	151	21	13.9%
Utah	27	6	22.2%	52	0	0.0%	79	6	7.6%
Vermont	106	4	3.8%	47	2	4.3%	158	6	3.8%
Washington	64	8	12.5%	38	1	2.6%	102	9	8.8%
West Virginia	74	5	6.8%	25	0	0.0%	99	5	5.1%
Wisconsin	51	13	25.5%	40	0	0.0%	92	13	14.1%
Wyoming	18	7	38.9%	42	0	0.0%	60	7	11.7%

Incumbents defeated in primaries

In state legislative primaries, 116 incumbents lost to challengers, 2.3% of incumbents running for re-election.

In 2010 primaries:

58 Democratic incumbents lost, 2.0% of the 2,870 Democratic incumbents who ran.

58 Republican incumbents lost, 2.8% of the 2,101 Republican incumbents who ran.

In 2010

Click [show] on the table below to view primary incumbent defeat statistics by state in 2010. Hover over column headings to learn more about their contents.

State legislative incumbents defeated in primaries, 2010
State
	Democratic			Republican			Total
	Filed	Def.	%	Filed	Def.	%	Filed	Def.	%
Nationwide	2,870	58	2.0%	2,101	58	2.8%	4,984	116	2.3%
Alabama	69	3	4.3%	51	3	5.9%	121	6	5.0%
Alaska	22	0	0.0%	23	0	0.0%	45	0	0.0%
Arizona	20	1	5.0%	31	3	9.7%	51	4	7.8%
Arkansas	42	1	2.4%	22	0	0.0%	64	1	1.6%
California	44	0	0.0%	18	0	0.0%	62	0	0.0%
Colorado	37	0	0.0%	26	0	0.0%	64	0	0.0%
Connecticut	124	1	0.8%	44	0	0.0%	168	1	0.6%
Delaware	32	1	3.1%	16	0	0.0%	48	1	2.1%
Florida	40	0	0.0%	57	1	1.8%	97	1	1.0%
Georgia	86	2	2.3%	111	3	2.7%	198	5	2.5%
Hawaii	52	1	1.9%	6	0	0.0%	58	1	1.7%
Idaho	19	0	0.0%	77	6	7.8%	96	6	6.3%
Illinois	76	0	0.0%	51	1	2.0%	127	1	0.8%
Indiana	56	0	0.0%	57	2	3.5%	113	2	1.8%
Iowa	65	1	1.5%	43	1	2.3%	108	2	1.9%
Kansas	45	1	2.2%	70	4	5.7%	115	5	4.3%
Kentucky	68	1	1.5%	43	1	2.3%	112	2	1.8%
Maine	94	1	1.1%	49	0	0.0%	143	1	0.7%
Maryland	121	7	5.8%	41	4	9.8%	162	11	6.8%
Massachusetts	151	1	0.7%	15	0	0.0%	166	1	0.6%
Michigan	40	0	0.0%	28	0	0.0%	68	0	0.0%
Minnesota	121	1	0.8%	56	1	1.8%	177	2	1.1%
Missouri	55	2	3.6%	50	1	2.0%	105	3	2.9%
Montana	34	1	2.9%	41	1	2.4%	75	2	2.7%
Nebraska	10	0	0.0%	10	0	0.0%	21	0	0.0%
Nevada	17	0	0.0%	9	1	11.1%	26	1	3.8%
New Hampshire	178	3	1.7%	144	8	5.6%	322	11	3.4%
New Mexico	44	1	2.3%	23	1	4.3%	67	2	3.0%
New York	128	4	3.1%	59	0	0.0%	187	4	2.1%
North Carolina	88	4	4.5%	64	1	1.6%	152	5	3.3%
North Dakota	24	0	0.0%	33	0	0.0%	57	0	0.0%
Ohio	47	1	2.1%	40	0	0.0%	87	1	1.1%
Oklahoma	41	1	2.4%	62	0	0.0%	103	1	1.0%
Oregon	44	0	0.0%	25	0	0.0%	69	0	0.0%
Pennsylvania	100	0	0.0%	107	1	0.9%	207	1	0.5%
Rhode Island	88	9	10.2%	9	1	11.1%	98	10	10.2%
South Carolina	48	0	0.0%	64	5	7.8%	112	5	4.5%
South Dakota	26	1	3.8%	45	0	0.0%	71	1	1.4%
Tennessee	54	0	0.0%	51	2	3.9%	106	2	1.9%
Texas	75	4	5.3%	82	3	3.7%	157	7	4.5%
Utah	27	0	0.0%	54	2	3.7%	81	2	2.5%
Vermont	107	0	0.0%	47	0	0.0%	159	0	0.0%
Washington	65	1	1.5%	38	0	0.0%	103	1	1.0%
West Virginia	76	2	2.6%	27	1	3.7%	103	3	2.9%
Wisconsin	52	1	1.9%	40	0	0.0%	93	1	1.1%
Wyoming	18	0	0.0%	42	0	0.0%	60	0	0.0%

Alabama

General election defeats

There were 140 seats up for election in Alabama. Overall, 113 incumbents advanced to the general election, including 65 Democrats, 47 Republicans, and one independent. Of that total, 22 incumbents lost—21 Democrats and one Republican—representing 19.5% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Alabama, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	49	14	28.6%	38	1	2.6%	87	15	17.2%
Senate	16	7	43.8%	9	0	0.0%	26	7	26.9%
Total	65	21	32.3%	47	1	2.1%	113	22	19.5%

Primary defeats

There were 140 seats up for election in Alabama. Overall, 121 incumbents filed for re-election, including 69 Democrats and 51 Republicans. Of that total, six incumbents lost in primaries—three Democrats and three Republicans—representing 5.0% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Alabama, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	53	17	3	5.7%	41	11	2	4.9%	94	28	5	5.3%
Senate	16	4	0	0.0%	10	2	1	10.0%	27	6	1	3.7%
Total	69	21	3	4.3%	51	13	3	5.9%	121	34	6	5.0%

Alaska

General election defeats

There were 50 seats up for election in Alaska. Overall, 45 incumbents advanced to the general election, including 22 Democrats and 23 Republicans. Of that total, three incumbents lost—two Democrats and one Republican—representing 6.7% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Alaska, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	17	2	11.8%	19	1	5.3%	36	3	8.3%
Senate	5	0	0.0%	4	0	0.0%	9	0	0.0%
Total	22	2	9.1%	23	1	4.3%	45	3	6.7%

Primary defeats

There were 50 seats up for election in Alaska. Overall, 45 incumbents filed for re-election, including 22 Democrats and 23 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Alaska, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	17	1	0	0.0%	19	5	0	0.0%	36	6	0	0.0%
Senate	5	0	0	0.0%	4	0	0	0.0%	9	0	0	0.0%
Total	22	1	0	0.0%	23	5	0	0.0%	45	6	0	0.0%

Arizona

General election defeats

There were 90 seats up for election in Arizona. Overall, 47 incumbents advanced to the general election, including 19 Democrats and 28 Republicans. Of that total, six Democratic incumbents lost, representing 12.8% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Arizona, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	13	3	23.1%	20	0	0.0%	33	3	9.1%
Senate	6	3	50.0%	8	0	0.0%	14	3	21.4%
Total	19	6	31.6%	28	0	0.0%	47	6	12.8%

Primary defeats

There were 90 seats up for election in Arizona. Overall, 51 incumbents filed for re-election, including 20 Democrats and 31 Republicans. Of that total, four incumbents lost in primaries—one Democrat and three Republicans—representing 7.8% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Arizona, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	14	6	1	7.1%	22	15	2	9.1%	36	21	3	8.3%
Senate	6	1	0	0.0%	9	4	1	11.1%	15	5	1	6.7%
Total	20	7	1	5.0%	31	19	3	9.7%	51	26	4	7.8%

Arkansas

General election defeats

There were 117 seats up for election in Arkansas. Overall, 63 incumbents advanced to the general election, including 41 Democrats and 22 Republicans. Of that total, six Democratic incumbents lost, representing 9.5% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Arkansas, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	38	6	15.8%	21	0	0.0%	59	6	10.2%
Senate	3	0	0.0%	1	0	0.0%	4	0	0.0%
Total	41	6	14.6%	22	0	0.0%	63	6	9.5%

Primary defeats

There were 117 seats up for election in Arkansas. Overall, 64 incumbents filed for re-election, including 42 Democrats and 22 Republicans. Of that total, one Democratic incumbent lost in a primary, representing 1.6% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Arkansas, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	39	2	1	2.6%	21	1	0	0.0%	60	3	1	1.7%
Senate	3	1	0	0.0%	1	0	0	0.0%	4	1	0	0.0%
Total	42	3	1	2.4%	22	1	0	0.0%	64	4	1	1.6%

California

General election defeats

There were 100 seats up for election in California. Overall, 62 incumbents advanced to the general election, including 44 Democrats and 18 Republicans. No incumbents who advanced to the general election lost.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in California, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	35	0	0.0%	17	0	0.0%	52	0	0.0%
Senate	9	0	0.0%	1	0	0.0%	10	0	0.0%
Total	44	0	0.0%	18	0	0.0%	62	0	0.0%

Primary defeats

There were 100 seats up for election in California. Overall, 62 incumbents filed for re-election, including 44 Democrats and 18 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in California, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	35	3	0	0.0%	17	3	0	0.0%	52	6	0	0.0%
Senate	9	0	0	0.0%	1	0	0	0.0%	10	0	0	0.0%
Total	44	3	0	0.0%	18	3	0	0.0%	62	6	0	0.0%

Colorado

General election defeats

There were 84 seats up for election in Colorado. Overall, 64 incumbents advanced to the general election, including 37 Democrats, 26 Republicans, and one independent. Of that total, seven incumbents lost—six Democrats and one independent—representing 10.9% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Colorado, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	29	5	17.2%	21	0	0.0%	51	6	11.8%
Senate	8	1	12.5%	5	0	0.0%	13	1	7.7%
Total	37	6	16.2%	26	0	0.0%	64	7	10.9%

Primary defeats

There were 84 seats up for election in Colorado. Overall, 64 incumbents filed for re-election, including 37 Democrats and 26 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Colorado, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	29	0	0	0.0%	21	0	0	0.0%	51	0	0	0.0%
Senate	8	1	0	0.0%	5	0	0	0.0%	13	1	0	0.0%
Total	37	1	0	0.0%	26	0	0	0.0%	64	1	0	0.0%

Connecticut

General election defeats

There were 187 seats up for election in Connecticut. Overall, 167 incumbents advanced to the general election, including 123 Democrats and 44 Republicans. Of that total, 13 Democratic incumbents lost, representing 7.8% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Connecticut, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	101	12	11.9%	34	0	0.0%	135	12	8.9%
Senate	22	1	4.5%	10	0	0.0%	32	1	3.1%
Total	123	13	10.6%	44	0	0.0%	167	13	7.8%

Primary defeats

There were 187 seats up for election in Connecticut. Overall, 168 incumbents filed for re-election, including 124 Democrats and 44 Republicans. Of that total, one Democratic incumbent lost in a primary, representing 0.6% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Connecticut, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	102	9	1	1.0%	34	0	0	0.0%	136	9	1	0.7%
Senate	22	1	0	0.0%	10	0	0	0.0%	32	1	0	0.0%
Total	124	10	1	0.8%	44	0	0	0.0%	168	10	1	0.6%

Delaware

General election defeats

There were 52 seats up for election in Delaware. Overall, 47 incumbents advanced to the general election, including 31 Democrats and 16 Republicans. Of that total, three incumbents lost—two Democrats and one Republican—representing 6.4% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Delaware, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	23	1	4.3%	13	1	7.7%	36	2	5.6%
Senate	8	1	12.5%	3	0	0.0%	11	1	9.1%
Total	31	2	6.5%	16	1	6.3%	47	3	6.4%

Primary defeats

There were 52 seats up for election in Delaware. Overall, 48 incumbents filed for re-election, including 32 Democrats and 16 Republicans. Of that total, one Democratic incumbent lost in a primary, representing 2.1% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Delaware, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	24	5	1	4.2%	13	0	0	0.0%	37	5	1	2.7%
Senate	8	1	0	0.0%	3	1	0	0.0%	11	2	0	0.0%
Total	32	6	1	3.1%	16	1	0	0.0%	48	7	1	2.1%

Florida

General election defeats

There were 143 seats up for election in Florida. Overall, 95 incumbents advanced to the general election, including 40 Democrats and 55 Republicans. Of that total, five Democratic incumbents lost, representing 5.3% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Florida, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	36	5	13.9%	48	0	0.0%	84	5	6.0%
Senate	4	0	0.0%	7	0	0.0%	11	0	0.0%
Total	40	5	12.5%	55	0	0.0%	95	5	5.3%

Primary defeats

There were 143 seats up for election in Florida. Overall, 97 incumbents filed for re-election, including 40 Democrats and 57 Republicans. Of that total, one Republican incumbent lost in a primary, representing 1.0% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Florida, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	36	6	0	0.0%	50	10	1	2.0%	86	16	1	1.2%
Senate	4	0	0	0.0%	7	2	0	0.0%	11	2	0	0.0%
Total	40	6	0	0.0%	57	12	1	1.8%	97	18	1	1.0%

Georgia

General election defeats

There were 236 seats up for election in Georgia. Overall, 193 incumbents advanced to the general election, including 84 Democrats, 108 Republicans, and one independent. Of that total, three incumbents lost—two Democrats and one Republican—representing 1.6% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Georgia, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	64	2	3.1%	84	1	1.2%	149	3	2.0%
Senate	20	0	0.0%	24	0	0.0%	44	0	0.0%
Total	84	2	2.4%	108	1	0.9%	193	3	1.6%

Primary defeats

There were 236 seats up for election in Georgia. Overall, 198 incumbents filed for re-election, including 86 Democrats and 111 Republicans. Of that total, five incumbents lost in primaries—two Democrats and three Republicans—representing 2.5% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Georgia, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	66	15	2	3.0%	86	15	2	2.3%	153	30	4	2.6%
Senate	20	4	0	0.0%	25	7	1	4.0%	45	11	1	2.2%
Total	86	19	2	2.3%	111	22	3	2.7%	198	41	5	2.5%

Hawaii

General election defeats

There were 66 seats up for election in Hawaii. Overall, 57 incumbents advanced to the general election, including 51 Democrats and six Republicans. Of that total, one Democratic incumbent lost, representing 1.8% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Hawaii, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	40	1	2.5%	5	0	0.0%	45	1	2.2%
Senate	11	0	0.0%	1	0	0.0%	12	0	0.0%
Total	51	1	2.0%	6	0	0.0%	57	1	1.8%

Primary defeats

There were 66 seats up for election in Hawaii. Overall, 58 incumbents filed for re-election, including 52 Democrats and six Republicans. Of that total, one Democratic incumbent lost in a primary, representing 1.7% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Hawaii, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	41	18	1	2.4%	5	0	0	0.0%	46	18	1	2.2%
Senate	11	6	0	0.0%	1	0	0	0.0%	12	6	0	0.0%
Total	52	24	1	1.9%	6	0	0	0.0%	58	24	1	1.7%

Idaho

General election defeats

There were 105 seats up for election in Idaho. Overall, 90 incumbents advanced to the general election, including 19 Democrats and 71 Republicans. Of that total, two Democratic incumbents lost, representing 2.2% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Idaho, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	13	2	15.4%	47	0	0.0%	60	2	3.3%
Senate	6	0	0.0%	24	0	0.0%	30	0	0.0%
Total	19	2	10.5%	71	0	0.0%	90	2	2.2%

Primary defeats

There were 105 seats up for election in Idaho. Overall, 96 incumbents filed for re-election, including 19 Democrats and 77 Republicans. Of that total, six Republican incumbents lost in primaries, representing 6.3% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Idaho, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	13	0	0	0.0%	49	13	2	4.1%	62	13	2	3.2%
Senate	6	1	0	0.0%	28	12	4	14.3%	34	13	4	11.8%
Total	19	1	0	0.0%	77	25	6	7.8%	96	26	6	6.3%

Illinois

General election defeats

There were 139 seats up for election in Illinois. Overall, 125 incumbents advanced to the general election, including 75 Democrats and 50 Republicans. Of that total, seven Democratic incumbents lost, representing 5.6% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Illinois, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	62	5	8.1%	43	0	0.0%	105	5	4.8%
Senate	13	2	15.4%	7	0	0.0%	20	2	10.0%
Total	75	7	9.3%	50	0	0.0%	125	7	5.6%

Primary defeats

There were 139 seats up for election in Illinois. Overall, 127 incumbents filed for re-election, including 76 Democrats and 51 Republicans. Of that total, one Republican incumbent lost in a primary, representing 0.8% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Illinois, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	63	12	0	0.0%	44	6	1	2.3%	107	18	1	0.9%
Senate	13	2	0	0.0%	7	1	0	0.0%	20	3	0	0.0%
Total	76	14	0	0.0%	51	7	1	2.0%	127	21	1	0.8%

Indiana

General election defeats

There were 125 seats up for election in Indiana. Overall, 111 incumbents advanced to the general election, including 56 Democrats and 55 Republicans. Of that total, 10 Democratic incumbents lost, representing 9.0% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Indiana, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	48	8	16.7%	41	0	0.0%	89	8	9.0%
Senate	8	2	25.0%	14	0	0.0%	22	2	9.1%
Total	56	10	17.9%	55	0	0.0%	111	10	9.0%

Primary defeats

There were 125 seats up for election in Indiana. Overall, 113 incumbents filed for re-election, including 56 Democrats and 57 Republicans. Of that total, two Republican incumbents lost in primaries, representing 1.8% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Indiana, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	48	5	0	0.0%	43	13	2	4.7%	91	18	2	2.2%
Senate	8	1	0	0.0%	14	2	0	0.0%	22	3	0	0.0%
Total	56	6	0	0.0%	57	15	2	3.5%	113	21	2	1.8%

Iowa

General election defeats

There were 125 seats up for election in Iowa. Overall, 105 incumbents advanced to the general election, including 63 Democrats and 42 Republicans. Of that total, 18 Democratic incumbents lost, representing 17.1% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Iowa, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	46	13	28.3%	38	0	0.0%	84	13	15.5%
Senate	17	5	29.4%	4	0	0.0%	21	5	23.8%
Total	63	18	28.6%	42	0	0.0%	105	18	17.1%

Primary defeats

There were 125 seats up for election in Iowa. Overall, 108 incumbents filed for re-election, including 65 Democrats and 43 Republicans. Of that total, two incumbents lost in primaries—one Democrat and one Republican—representing 1.9% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Iowa, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	48	5	1	2.1%	38	2	0	0.0%	86	7	1	1.2%
Senate	17	0	0	0.0%	5	1	1	20.0%	22	1	1	4.5%
Total	65	5	1	1.5%	43	3	1	2.3%	108	8	2	1.9%

Kansas

General election defeats

There were 125 seats up for election in Kansas. Overall, 110 incumbents advanced to the general election, including 44 Democrats and 66 Republicans. Of that total, 13 Democratic incumbents lost, representing 11.8% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Kansas, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	44	13	29.5%	66	0	0.0%	110	13	11.8%
Senate	Did not hold elections.
Total	44	13	29.5%	66	0	0.0%	110	13	11.8%

Primary defeats

There were 125 seats up for election in Kansas. Overall, 115 incumbents filed for re-election, including 45 Democrats and 70 Republicans. Of that total, five incumbents lost in primaries—one Democrat and four Republican—representing 4.3% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Kansas, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	45	3	1	2.2%	70	20	4	5.7%	115	23	5	4.3%
Senate	Did not hold elections.
Total	45	3	1	2.2%	70	20	4	5.7%	115	23	5	4.3%

Kentucky

General election defeats

There were 119 seats up for election in Kentucky. Overall, 110 incumbents advanced to the general election, including 67 Democrats, 42 Republicans, and one independent. Of that total, eight incumbents lost—seven Democrats and one Republican—representing 7.3% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Kentucky, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	61	5	8.2%	32	0	0.0%	93	5	5.4%
Senate	6	2	33.3%	10	1	10.0%	17	3	17.6%
Total	67	7	10.4%	42	1	2.4%	110	8	7.3%

Primary defeats

There were 119 seats up for election in Kentucky. Overall, 112 incumbents filed for re-election, including 68 Democrats and 43 Republicans. Of that total, two incumbents lost in primaries—one Democrat and one Republican—representing 1.8% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Kentucky, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	62	10	1	1.6%	33	5	1	3.0%	95	15	2	2.1%
Senate	6	1	0	0.0%	10	5	0	0.0%	17	6	0	0.0%
Total	68	11	1	1.5%	43	10	1	2.3%	112	21	2	1.8%

Maine

General election defeats

There were 186 seats up for election in Maine. Overall, 139 incumbents advanced to the general election, including 90 Democrats and 49 Republicans. Of that total, 20 incumbents lost—19 Democrats and one Republican—representing 14.4% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Maine, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	75	16	21.3%	39	0	0.0%	114	16	14.0%
Senate	15	3	20.0%	10	1	10.0%	25	4	16.0%
Total	90	19	21.1%	49	1	2.0%	139	20	14.4%

Primary defeats

There were 186 seats up for election in Maine. Overall, 143 incumbents filed for re-election, including 94 Democrats and 49 Republicans. Of that total, one Democratic incumbent lost in a primary, representing 0.7% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Maine, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	78	3	1	1.3%	39	1	0	0.0%	117	4	1	0.9%
Senate	16	0	0	0.0%	10	0	0	0.0%	26	0	0	0.0%
Total	94	3	1	1.1%	49	1	0	0.0%	143	4	1	0.7%

Maryland

General election defeats

There were 188 seats up for election in Maryland. Overall, 151 incumbents advanced to the general election, including 114 Democrats and 37 Republicans. Of that total, three incumbents lost—two Democrats and one Republican—representing 2.0% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Maryland, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	86	2	2.3%	27	0	0.0%	113	2	1.8%
Senate	28	0	0.0%	10	1	10.0%	38	1	2.6%
Total	114	2	1.8%	37	1	2.7%	151	3	2.0%

Primary defeats

There were 188 seats up for election in Maryland. Overall, 162 incumbents filed for re-election, including 121 Democrats and 41 Republicans. Of that total, 11 incumbents lost in primaries—seven Democrats and four Republicans—representing 6.8% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Maryland, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	88	65	2	2.3%	30	21	3	10.0%	118	86	5	4.2%
Senate	33	13	5	15.2%	11	6	1	9.1%	44	19	6	13.6%
Total	121	78	7	5.8%	41	27	4	9.8%	162	105	11	6.8%

Massachusetts

General election defeats

There were 200 seats up for election in Massachusetts. Overall, 165 incumbents advanced to the general election, including 150 Democrats and 15 Republicans. Of that total, 10 Democratic incumbents lost, representing 6.1% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Massachusetts, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	122	10	8.2%	11	0	0.0%	133	10	7.5%
Senate	28	0	0.0%	4	0	0.0%	32	0	0.0%
Total	150	10	6.7%	15	0	0.0%	165	10	6.1%

Primary defeats

There were 200 seats up for election in Massachusetts. Overall, 166 incumbents filed for re-election, including 151 Democrats and 15 Republicans. Of that total, one Democratic incumbent lost in a primary, representing 0.6% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Massachusetts, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	123	10	1	0.8%	11	0	0	0.0%	134	10	1	0.7%
Senate	28	4	0	0.0%	4	0	0	0.0%	32	4	0	0.0%
Total	151	14	1	0.7%	15	0	0	0.0%	166	14	1	0.6%

Michigan

General election defeats

There were 148 seats up for election in Michigan. Overall, 68 incumbents advanced to the general election, including 40 Democrats and 28 Republicans. Of that total, nine Democratic incumbents lost, representing 13.2% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Michigan, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	36	9	25.0%	23	0	0.0%	59	9	15.3%
Senate	4	0	0.0%	5	0	0.0%	9	0	0.0%
Total	40	9	22.5%	28	0	0.0%	68	9	13.2%

Primary defeats

There were 148 seats up for election in Michigan. Overall, 68 incumbents filed for re-election, including 40 Democrats and 28 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Michigan, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	36	10	0	0.0%	23	4	0	0.0%	59	14	0	0.0%
Senate	4	0	0	0.0%	5	3	0	0.0%	9	3	0	0.0%
Total	40	10	0	0.0%	28	7	0	0.0%	68	17	0	0.0%

Minnesota

General election defeats

There were 201 seats up for election in Minnesota. Overall, 175 incumbents advanced to the general election, including 120 Democrats and 55 Republicans. Of that total, 34 Democratic incumbents lost, representing 19.4% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Minnesota, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	80	21	26.3%	39	0	0.0%	119	21	17.6%
Senate	40	13	32.5%	16	0	0.0%	56	13	23.2%
Total	120	34	28.3%	55	0	0.0%	175	34	19.4%

Primary defeats

There were 201 seats up for election in Minnesota. Overall, 177 incumbents filed for re-election, including 121 Democrats and 56 Republicans. Of that total, two incumbents lost in primaries—one Democrat and one Republican—representing 1.1% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Minnesota, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	80	2	0	0.0%	39	1	0	0.0%	119	3	0	0.0%
Senate	41	3	1	2.4%	17	2	1	5.9%	58	5	2	3.4%
Total	121	5	1	0.8%	56	3	1	1.8%	177	8	2	1.1%

Missouri

General election defeats

There were 180 seats up for election in Missouri. Overall, 102 incumbents advanced to the general election, including 53 Democrats and 49 Republicans. Of that total, 12 Democratic incumbents lost, representing 11.8% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Missouri, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	48	10	20.8%	47	0	0.0%	95	10	10.5%
Senate	5	2	40.0%	2	0	0.0%	7	2	28.6%
Total	53	12	22.6%	49	0	0.0%	102	12	11.8%

Primary defeats

There were 180 seats up for election in Missouri. Overall, 105 incumbents filed for re-election, including 55 Democrats and 50 Republicans. Of that total, three incumbents lost in primaries—two Democrats and one Republican—representing 2.9% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Missouri, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	50	6	2	4.0%	48	6	1	2.1%	98	12	3	3.1%
Senate	5	2	0	0.0%	2	1	0	0.0%	7	3	0	0.0%
Total	55	8	2	3.6%	50	7	1	2.0%	105	15	3	2.9%

Montana

General election defeats

There were 126 seats up for election in Montana. Overall, 73 incumbents advanced to the general election, including 33 Democrats and 40 Republicans. Of that total, 10 incumbents lost—nine Democrats and one Republican—representing 13.7% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Montana, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	30	9	30.0%	34	0	0.0%	64	9	14.1%
Senate	3	0	0.0%	6	1	16.7%	9	1	11.1%
Total	33	9	27.3%	40	1	2.5%	73	10	13.7%

Primary defeats

There were 126 seats up for election in Montana. Overall, 75 incumbents filed for re-election, including 34 Democrats and 41 Republicans. Of that total, two incumbents lost in primaries—one Democrat and one Republican—representing 2.7% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Montana, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	31	3	1	3.2%	35	8	1	2.9%	66	11	2	3.0%
Senate	3	0	0	0.0%	6	0	0	0.0%	9	0	0	0.0%
Total	34	3	1	2.9%	41	8	1	2.4%	75	11	2	2.7%

Nebraska

General election defeats

There were 24 seats up for election in Nebraska. Overall, 21 incumbents advanced to the general election, including 10 Democrats, 10 Republicans, and one independent. Of that total, two incumbents lost—one Democrat and one independent—representing 9.5% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Nebraska, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	N/A
Senate	10	1	10.0%	10	0	0.0%	21	2	9.5%
Total	10	1	10.0%	10	0	0.0%	21	2	9.5%

Primary defeats

There were 24 seats up for election in Nebraska. Overall, 21 incumbents filed for re-election, including 10 Democrats and 10 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Nebraska, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	N/A
Senate	10	4	0	0.0%	10	1	0	0.0%	21	6	0	0.0%
Total	10	4	0	0.0%	10	1	0	0.0%	21	6	0	0.0%

Nevada

General election defeats

There were 53 seats up for election in Nevada. Overall, 25 incumbents advanced to the general election, including 17 Democrats and eight Republicans. Of that total, two Democratic incumbents lost, representing 8.0% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Nevada, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	16	1	6.3%	7	0	0.0%	23	1	4.3%
Senate	1	1	100.0%	1	0	0.0%	2	1	50.0%
Total	17	2	11.8%	8	0	0.0%	25	2	8.0%

Primary defeats

There were 53 seats up for election in Nevada. Overall, 26 incumbents filed for re-election, including 17 Democrats and nine Republicans. Of that total, one Republican incumbent lost in a primary, representing 3.8% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Nevada, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	16	1	0	0.0%	7	3	0	0.0%	23	4	0	0.0%
Senate	1	0	0	0.0%	2	1	1	50.0%	3	1	1	33.3%
Total	17	1	0	0.0%	9	4	1	11.1%	26	5	1	3.8%

New Hampshire

General election defeats

There were 424 seats up for election in New Hampshire. Overall, 311 incumbents advanced to the general election, including 174 Democrats and 137 Republicans. Of that total, 88 Democratic incumbents lost, representing 28.3% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in New Hampshire, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	162	81	50.0%	130	0	0.0%	292	81	27.7%
Senate	12	7	58.3%	7	0	0.0%	19	7	36.8%
Total	174	88	50.6%	137	0	0.0%	311	88	28.3%

Primary defeats

There were 424 seats up for election in New Hampshire. Overall, 322 incumbents filed for re-election, including 178 Democrats and 144 Republicans. Of that total, 11 incumbents lost in primaries—three Democrats and eight Republicans—representing 3.4% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in New Hampshire, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	166	44	3	1.8%	137	79	8	5.8%	303	123	11	3.6%
Senate	12	1	0	0.0%	7	0	0	0.0%	19	1	0	0.0%
Total	178	45	3	1.7%	144	79	8	5.6%	322	124	11	3.4%

New Mexico

General election defeats

There were 70 seats up for election in New Mexico. Overall, 65 incumbents advanced to the general election, including 43 Democrats and 22 Republicans. Of that total, seven Democratic incumbents lost, representing 10.8% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in New Mexico, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	43	7	16.3%	22	0	0.0%	65	7	10.8%
Senate	Did not hold elections.
Total	43	7	16.3%	22	0	0.0%	65	7	10.8%

Primary defeats

There were 70 seats up for election in New Mexico. Overall, 67 incumbents filed for re-election, including 44 Democrats and 23 Republicans. Of that total, two incumbents lost in primaries—one Democrat and one Republican—representing 3.0% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in New Mexico, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	44	10	1	2.3%	23	4	1	4.3%	67	14	2	3.0%
Senate	Did not hold elections.
Total	44	10	1	2.3%	23	4	1	4.3%	67	14	2	3.0%

New York

General election defeats

There were 212 seats up for election in New York. Overall, 183 incumbents advanced to the general election, including 124 Democrats and 59 Republicans. Of that total, 11 incumbents lost—10 Democrats and one Republican—representing 6.0% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in New York, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	96	6	6.3%	33	0	0.0%	129	6	4.7%
Senate	28	4	14.3%	26	1	3.8%	54	5	9.3%
Total	124	10	8.1%	59	1	1.7%	183	11	6.0%

Primary defeats

There were 212 seats up for election in New York. Overall, 187 incumbents filed for re-election, including 128 Democrats and 59 Republicans. Of that total, four Democratic incumbents lost in primaries, representing 2.1% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in New York, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	98	22	2	2.0%	33	2	0	0.0%	131	24	2	1.5%
Senate	30	13	2	6.7%	26	0	0	0.0%	56	13	2	3.6%
Total	128	35	4	3.1%	59	2	0	0.0%	187	37	4	2.1%

North Carolina

General election defeats

There were 170 seats up for election in North Carolina. Overall, 146 incumbents advanced to the general election, including 83 Democrats and 63 Republicans. Of that total, 20 Democratic incumbents lost, representing 13.7% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in North Carolina, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	59	13	22.0%	45	0	0.0%	104	13	12.5%
Senate	24	7	29.2%	18	0	0.0%	42	7	16.7%
Total	83	20	24.1%	63	0	0.0%	146	20	13.7%

Primary defeats

There were 170 seats up for election in North Carolina. Overall, 152 incumbents filed for re-election, including 88 Democrats and 64 Republicans. Of that total, five incumbents lost in primaries—four Democrats and one Republican—representing 3.3% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in North Carolina, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	64	17	4	6.3%	46	11	1	2.2%	110	28	5	4.5%
Senate	24	7	0	0.0%	18	4	0	0.0%	42	11	0	0.0%
Total	88	24	4	4.5%	64	15	1	1.6%	152	39	5	3.3%

North Dakota

General election defeats

There were 72 seats up for election in North Dakota. Overall, 57 incumbents advanced to the general election, including 24 Democrats and 33 Republicans. Of that total, 12 Democratic incumbents lost, representing 21.1% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in North Dakota, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	14	7	50.0%	23	0	0.0%	37	7	18.9%
Senate	10	5	50.0%	10	0	0.0%	20	5	25.0%
Total	24	12	50.0%	33	0	0.0%	57	12	21.1%

Primary defeats

There were 72 seats up for election in North Dakota. Overall, 57 incumbents filed for re-election, including 24 Democrats and 33 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in North Dakota, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	14	2	0	0.0%	23	0	0	0.0%	37	2	0	0.0%
Senate	10	0	0	0.0%	10	0	0	0.0%	20	0	0	0.0%
Total	24	2	0	0.0%	33	0	0	0.0%	57	2	0	0.0%

Ohio

General election defeats

There were 116 seats up for election in Ohio. Overall, 86 incumbents advanced to the general election, including 46 Democrats and 40 Republicans. Of that total, 13 Democratic incumbents lost, representing 15.1% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Ohio, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	40	11	27.5%	37	0	0.0%	77	11	14.3%
Senate	6	2	33.3%	3	0	0.0%	9	2	22.2%
Total	46	13	28.3%	40	0	0.0%	86	13	15.1%

Primary defeats

There were 116 seats up for election in Ohio. Overall, 87 incumbents filed for re-election, including 47 Democrats and 40 Republicans. Of that total, one Democratic incumbent lost in a primary, representing 1.1% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Ohio, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	41	5	1	2.4%	37	7	0	0.0%	78	12	1	1.3%
Senate	6	1	0	0.0%	3	1	0	0.0%	9	2	0	0.0%
Total	47	6	1	2.1%	40	8	0	0.0%	87	14	1	1.1%

Oklahoma

General election defeats

There were 125 seats up for election in Oklahoma. Overall, 102 incumbents advanced to the general election, including 40 Democrats and 62 Republicans. Of that total, six Democratic incumbents lost, representing 5.9% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Oklahoma, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	32	5	15.6%	54	0	0.0%	86	5	5.8%
Senate	8	1	12.5%	8	0	0.0%	16	1	6.3%
Total	40	6	15.0%	62	0	0.0%	102	6	5.9%

Primary defeats

There were 125 seats up for election in Oklahoma. Overall, 103 incumbents filed for re-election, including 41 Democrats and 62 Republicans. Of that total, one Democratic incumbent lost in a primary, representing 1.0% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Oklahoma, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	33	4	1	3.0%	54	4	0	0.0%	87	8	1	1.1%
Senate	8	1	0	0.0%	8	3	0	0.0%	16	4	0	0.0%
Total	41	5	1	2.4%	62	7	0	0.0%	103	12	1	1.0%

Oregon

General election defeats

There were 76 seats up for election in Oregon. Overall, 68 incumbents advanced to the general election, including 43 Democrats and 25 Republicans. Of that total, four Democratic incumbents lost, representing 5.9% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Oregon, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	33	3	9.1%	21	0	0.0%	54	3	5.6%
Senate	10	1	10.0%	4	0	0.0%	14	1	7.1%
Total	43	4	9.3%	25	0	0.0%	68	4	5.9%

Primary defeats

There were 76 seats up for election in Oregon. Overall, 69 incumbents filed for re-election, including 44 Democrats and 25 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Oregon, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	34	1	0	0.0%	21	6	0	0.0%	55	7	0	0.0%
Senate	10	1	0	0.0%	4	1	0	0.0%	14	2	0	0.0%
Total	44	2	0	0.0%	25	7	0	0.0%	69	9	0	0.0%

Pennsylvania

General election defeats

There were 228 seats up for election in Pennsylvania. Overall, 207 incumbents advanced to the general election, including 101 Democrats and 106 Republicans. Of that total, nine Democratic incumbents lost, representing 4.3% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Pennsylvania, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	94	9	9.6%	91	0	0.0%	185	9	4.9%
Senate	7	0	0.0%	15	0	0.0%	22	0	0.0%
Total	101	9	8.9%	106	0	0.0%	207	9	4.3%

Primary defeats

There were 228 seats up for election in Pennsylvania. Overall, 207 incumbents filed for re-election, including 100 Democrats and 107 Republicans. Of that total, one Republican incumbent lost in a primary, representing 0.5% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Pennsylvania, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	93	18	0	0.0%	92	9	1	1.1%	185	27	1	0.5%
Senate	7	2	0	0.0%	15	0	0	0.0%	22	2	0	0.0%
Total	100	20	0	0.0%	107	9	1	0.9%	207	29	1	0.5%

Rhode Island

General election defeats

There were 113 seats up for election in Rhode Island. Overall, 88 incumbents advanced to the general election, including 79 Democrats, eight Republicans, and one independent. Of that total, four Democratic incumbents lost, representing 4.5% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Rhode Island, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	51	3	5.9%	5	0	0.0%	56	3	5.4%
Senate	28	1	3.6%	3	0	0.0%	32	1	3.1%
Total	79	4	5.1%	8	0	0.0%	88	4	4.5%

Primary defeats

There were 113 seats up for election in Rhode Island. Overall, 98 incumbents filed for re-election, including 88 Democrats and nine Republicans. Of that total, 10 incumbents lost in primaries—nine Democrats and one Republican—representing 10.2% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Rhode Island, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	60	24	9	15.0%	5	1	0	0.0%	65	25	9	13.8%
Senate	28	8	0	0.0%	4	1	1	25.0%	33	9	1	3.0%
Total	88	32	9	10.2%	9	2	1	11.1%	98	34	10	10.2%

South Carolina

General election defeats

There were 124 seats up for election in South Carolina. Overall, 106 incumbents advanced to the general election, including 48 Democrats and 58 Republicans. Of that total, three Democratic incumbents lost, representing 2.8% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in South Carolina, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	48	3	6.3%	58	0	0.0%	106	3	2.8%
Senate	Did not hold elections.
Total	48	3	6.3%	58	0	0.0%	106	3	2.8%

Primary defeats

There were 124 seats up for election in South Carolina. Overall, 112 incumbents filed for re-election, including 48 Democrats and 64 Republicans. Of that total, five Republican incumbents lost in primaries, representing 4.5% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in South Carolina, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	48	11	0	0.0%	64	15	5	7.8%	112	26	5	4.5%
Senate	Did not hold elections.
Total	48	11	0	0.0%	64	15	5	7.8%	112	26	5	4.5%

South Dakota

General election defeats

There were 105 seats up for election in South Dakota. Overall, 69 incumbents advanced to the general election, including 25 Democrats and 44 Republicans. Of that total, nine Democratic incumbents lost, representing 13.0% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in South Dakota, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	20	5	25.0%	28	0	0.0%	48	5	10.4%
Senate	5	4	80.0%	16	0	0.0%	21	4	19.0%
Total	25	9	36.0%	44	0	0.0%	69	9	13.0%

Primary defeats

There were 105 seats up for election in South Dakota. Overall, 71 incumbents filed for re-election, including 26 Democrats and 45 Republicans. Of that total, one Democratic incumbent lost in a primary, representing 1.4% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in South Dakota, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	20	2	0	0.0%	29	4	0	0.0%	49	6	0	0.0%
Senate	6	1	1	16.7%	16	0	0	0.0%	22	1	1	4.5%
Total	26	3	1	3.8%	45	4	0	0.0%	71	7	1	1.4%

Tennessee

General election defeats

There were 116 seats up for election in Tennessee. Overall, 104 incumbents advanced to the general election, including 54 Democrats, 49 Republicans, and one independent. Of that total, 13 Democratic incumbents lost, representing 12.5% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Tennessee, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	47	12	25.5%	41	0	0.0%	89	12	13.5%
Senate	7	1	14.3%	8	0	0.0%	15	1	6.7%
Total	54	13	24.1%	49	0	0.0%	104	13	12.5%

Primary defeats

There were 116 seats up for election in Tennessee. Overall, 106 incumbents filed for re-election, including 54 Democrats and 51 Republicans. Of that total, two Republican incumbents lost in primaries, representing 1.9% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Tennessee, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	47	5	0	0.0%	43	5	2	4.7%	91	10	2	2.2%
Senate	7	1	0	0.0%	8	1	0	0.0%	15	2	0	0.0%
Total	54	6	0	0.0%	51	6	2	3.9%	106	12	2	1.9%

Texas

General election defeats

There were 166 seats up for election in Texas. Overall, 151 incumbents advanced to the general election, including 71 Democrats and 80 Republicans. Of that total, 21 Democratic incumbents lost, representing 13.9% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Texas, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	67	21	31.3%	69	0	0.0%	136	21	15.4%
Senate	4	0	0.0%	11	0	0.0%	15	0	0.0%
Total	71	21	29.6%	80	0	0.0%	151	21	13.9%

Primary defeats

There were 166 seats up for election in Texas. Overall, 157 incumbents filed for re-election, including 75 Democrats and 82 Republicans. Of that total, seven incumbents lost in primaries—four Democrats and three Republicans—representing 4.5% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Texas, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	71	7	4	5.6%	71	17	3	4.2%	142	24	7	4.9%
Senate	4	1	0	0.0%	11	3	0	0.0%	15	4	0	0.0%
Total	75	8	4	5.3%	82	20	3	3.7%	157	28	7	4.5%

Utah

General election defeats

There were 90 seats up for election in Utah. Overall, 79 incumbents advanced to the general election, including 27 Democrats and 52 Republicans. Of that total, six Democratic incumbents lost, representing 7.6% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Utah, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	21	5	23.8%	44	0	0.0%	65	5	7.7%
Senate	6	1	16.7%	8	0	0.0%	14	1	7.1%
Total	27	6	22.2%	52	0	0.0%	79	6	7.6%

Primary defeats

There were 90 seats up for election in Utah. Overall, 81 incumbents filed for re-election, including 27 Democrats and 54 Republicans. Of that total, two Republican incumbents lost in primaries, representing 2.5% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Utah, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	21	1	0	0.0%	46	5	2	4.3%	67	6	2	3.0%
Senate	6	0	0	0.0%	8	3	0	0.0%	14	3	0	0.0%
Total	27	1	0	0.0%	54	8	2	3.7%	81	9	2	2.5%

Vermont

General election defeats

There were 180 seats up for election in Vermont. Overall, 158 incumbents advanced to the general election, including 106 Democrats, 47 Republicans, and five independents. Of that total, six incumbents lost—four Democrats and two Republicans—representing 3.8% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Vermont, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	87	3	3.4%	41	2	4.9%	133	5	3.8%
Senate	19	1	5.3%	6	0	0.0%	25	1	4.0%
Total	106	4	3.8%	47	2	4.3%	158	6	3.8%

Primary defeats

There were 180 seats up for election in Vermont. Overall, 159 incumbents filed for re-election, including 107 Democrats and 47 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Vermont, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	88	3	0	0.0%	41	3	0	0.0%	134	6	0	0.0%
Senate	19	5	0	0.0%	6	2	0	0.0%	25	7	0	0.0%
Total	107	8	0	0.0%	47	5	0	0.0%	159	13	0	0.0%

Washington

General election defeats

There were 123 seats up for election in Washington. Overall, 102 incumbents advanced to the general election, including 64 Democrats and 38 Republicans. Of that total, nine incumbents lost—eight Democrats and one Republican—representing 8.8% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Washington, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	49	4	8.2%	33	1	3.0%	82	5	6.1%
Senate	15	4	26.7%	5	0	0.0%	20	4	20.0%
Total	64	8	12.5%	38	1	2.6%	102	9	8.8%

Primary defeats

There were 123 seats up for election in Washington. Overall, 103 incumbents filed for re-election, including 65 Democrats and 38 Republicans. Of that total, one Democratic incumbent lost in a primary, representing 1.0% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Washington, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	49	17	0	0.0%	33	2	0	0.0%	82	19	0	0.0%
Senate	16	4	1	6.3%	5	1	0	0.0%	21	5	1	4.8%
Total	65	21	1	1.5%	38	3	0	0.0%	103	24	1	1.0%

West Virginia

General election defeats

There were 117 seats up for election in West Virginia. Overall, 99 incumbents advanced to the general election, including 74 Democrats and 25 Republicans. Of that total, five Democratic incumbents lost, representing 5.1% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in West Virginia, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	64	5	7.8%	23	0	0.0%	87	5	5.7%
Senate	10	0	0.0%	2	0	0.0%	12	0	0.0%
Total	74	5	6.8%	25	0	0.0%	99	5	5.1%

Primary defeats

There were 117 seats up for election in West Virginia. Overall, 103 incumbents filed for re-election, including 76 Democrats and 27 Republicans. Of that total, three incumbents lost in primaries—two Democrats and one Republican—representing 2.9% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in West Virginia, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	65	39	1	1.5%	24	5	0	0.0%	89	44	1	1.1%
Senate	11	7	1	9.1%	3	1	1	33.3%	14	8	2	14.3%
Total	76	46	2	2.6%	27	6	1	3.7%	103	52	3	2.9%

Wisconsin

General election defeats

There were 116 seats up for election in Wisconsin. Overall, 92 incumbents advanced to the general election, including 51 Democrats, 40 Republicans, and one independent. Of that total, 13 Democratic incumbents lost, representing 14.1% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Wisconsin, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	43	10	23.3%	35	0	0.0%	79	10	12.7%
Senate	8	3	37.5%	5	0	0.0%	13	3	23.1%
Total	51	13	25.5%	40	0	0.0%	92	13	14.1%

Primary defeats

There were 116 seats up for election in Wisconsin. Overall, 93 incumbents filed for re-election, including 52 Democrats and 40 Republicans. Of that total, one Democratic incumbent lost in a primary, representing 1.1% of incumbents who filed for re-election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Wisconsin, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	43	5	0	0.0%	35	7	0	0.0%	79	12	0	0.0%
Senate	9	1	1	11.1%	5	0	0	0.0%	14	1	1	7.1%
Total	52	6	1	1.9%	40	7	0	0.0%	93	13	1	1.1%

Wyoming

General election defeats

There were 75 seats up for election in Wyoming. Overall, 60 incumbents advanced to the general election, including 18 Democrats and 42 Republicans. Of that total, seven Democratic incumbents lost, representing 11.7% of incumbents who advanced to the general election.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in general elections in Wyoming, 2010
Chamber
	Democratic incumbents			Republican incumbents			Total incumbents
	Running	Def.	%	Running	Def.	%	Running	Def.	%
House	14	4	28.6%	35	0	0.0%	49	4	8.2%
Senate	4	3	75.0%	7	0	0.0%	11	3	27.3%
Total	18	7	38.9%	42	0	0.0%	60	7	11.7%

Primary defeats

There were 75 seats up for election in Wyoming. Overall, 60 incumbents filed for re-election, including 18 Democrats and 42 Republicans. No incumbents who filed for re-election lost in primaries.

Statistics from 2010 are shown below. Hover over column headings to learn more about their contents.

Incumbents defeated in primaries in Wyoming, 2010
Chamber
	Democratic incumbents				Republican incumbents				Total incumbents
	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%	Filed	Cont.	Def.	%
House	14	0	0	0.0%	35	13	0	0.0%	49	13	0	0.0%
Senate	4	0	0	0.0%	7	2	0	0.0%	11	2	0	0.0%
Total	18	0	0	0.0%	42	15	0	0.0%	60	15	0	0.0%

See also

• Election results, 2010: State legislatures
• State legislative elections, 2010
  • Impact of term limits on state legislative elections in 2010
  • Open seats in state legislative elections, 2010
  • Contested state legislative primaries, 2010
  • State legislative incumbents in contested primaries, 2010
  • Major party competition in state legislative elections, 2010
  • State legislative incumbents without general election challengers, 2010
• Primary election competitiveness in state and federal government, 2010