Trump won't get any, their base is who is pushing hardest for impeachment.
If the economy crashes thanks to the government shutdown, it's just how huge of a majority Kamala Harris gets in both chambers of Congress to push through an agenda that will make Obama look like Reagan.
Dems were elected by swing voters in many of the 40 districts where they flipped the seat. Those swing voters are not interested in pointless obstruction and impeachment for partisan purposes. Lots of them gave speeches and said in debates that they would not do that.