After all, we're not just talking about an illegal retroactive on-demand line-item veto here, but plenty of other data-points, like a President that has blanket-pardoned criminals who already violently attacked congress in his name.
What's the plan for when the USPS suddenly has "breakdowns" or "misplaces" mail-in-ballots collected from certain districts? Or when IRS tax records from candidates are leaked to opposing conservative campaigns? Citizenships being "revoked" just enough to stop people from voting?
The man could keel over quite morally-blamelessly from a coronary tomorrow, and the record of words and deeds left behind would still be that of a crook, a corrupt politician, and a wannabe dictator.
Mere inaction in a 78-year-old is not reform. If it were, A Christmas Carol would have been a much shorter story.
Trump alone could easily tank almost any R congressman's reelection chances, and with big money backing him now, they can afford to bankroll the competitor's primary campaign.