Commentary: 'Sesame Street' exists because Democrats and Republicans worked together 50 years ago. Hard to imagine now, isn't it?

The opening days of the House impeachment inquiry deepened the sharp political divisions that make our country more polarized than we once could have imagined. We seem unable to find common ground on even the most fundamental issues of law and evidence. On those same days, I saw commemorations of the 50th anniversary of "Sesame Street" and began to reflect about an unbelievable series of coincidences that led a