From a New York Times guest essay by Yuval Levin headlined “Biden and Trump Share One Thing”:

Back in January, looking ahead to the midterm election year, President Biden said that he expected to be featured prominently by Democrats running for Congress. “I’m going to be out on the road a lot, making the case around the country, with my colleagues who are up for re-election,” he predicted.

It has not turned out that way. Instead, many Democratic candidates have practiced the delicate dance that politicians of both parties have had to master over the past two decades — keeping their distance from a president of their own party while not openly repudiating him.