Are GOP doomers overreacting?

This has been the week that a deep sense of pessimism about the upcoming midterm elections set in among Republicans around the country. Not just the political class of consultants and others intimately involved in campaigns — they have been pessimistic for a while, although their sense of foreboding seemed to rise to a higher level in recent days — but also among those who follow the news closely but don’t get down into the weeds of the race for control of the House and Senate.