Both Democratic and Republican operatives increasingly view Trump as a drag on GOP candidates in many key Senate and House races — especially in suburban areas, where polling and focus group data suggest he has been bleeding support…

“It’s just in the air,” Senate Minority Leader Charles E. Schumer (D-N.Y.) said in an interview. “You just feel it, the importance of taking back the Senate, the importance of getting the country moving again, the importance of paying attention to the middle class.”…

House Speaker Nancy Pelosi (D-Calif.) said in an interview that if the election were held today, Democrats would pick up seats and expand their majority. But she cautioned that Trump remains popular in a number of congressional districts in traditionally Republican areas that Democrats captured in the 2018 midterm elections, despite his collapse elsewhere, which endangers those incumbents.

“For reasons that are beyond my comprehension, he still has some favorability in these districts, and so the question is: In the last election, did people stay home because he wasn’t on the ballot and now turn out because he is on the ballot and they support him?” Pelosi said. “It’s the strangest phenomenon I have ever seen in politics.”