The ideal would be that a new president is elected who uses current powers to reverse/rebuild what Trump has torn down and have their "one big bill" that Congress seems to pull off per president be a reforms package that locks in additional checks and legislative powers against the Executive. The Unitary Executive theory is the most dangerous attack on our Constitution in a long time.

On the other hand, a right-wing Supreme Court may try to block any reforms that check the Executive. The Legislature's ultimate oversight power of the Exec is impeachment, and they have decided that no amount of corruption or crime or destruction should be checked as long as it "feels right".