I don't expect the new House Of Representatives to really help much with Trump, for a combination of multiple reasons.
•Most of the crap Trump's been doing has not gone through the HOR.
•The Senate will still not remove Trump even if he is impeached.
•Because of that, the HOR has no reason to bother impeaching.
•Investigations & subpoenas without impeachment have not even the potential for real-world results.
•Without that, they'll look like simple harassment, which is known to cause the "backfire effect".
•The real point is not anti-Trump measures but legislation, and the HOR can't pass & enact a bill alone.
•The party's "leaders" have a history of subservience & capitulation to Republicans & donors, not opposition.
•Its rank-&-file legislators include Republican wannabes who won't vote particularly progressively.
The main real reasons why last night's results are good news are more long-term.
•More potential voters in Florida from primarily Democrat/progressive groups
•Several anti-gerrymandering measures
•Continuation & acceleration of the erosion of the self-destructive Democrat myth of winning through "centrism"
•State legislatures & governorships moved R→D, too, not just Federal.
•Even a bill that gets shot down by the Senate/President can still promote an idea, to be acted on later.
•The Senate would expose itself as voting against things people want.