I just think the whole thing about “precedent” is nonsense. Suppose Obama had come after Trump. Do we honestly think that Obama would have a complete personality-ectomy and rule in a lawless, autocratic way because Trump did? No, Obama would still be Obama - a rule follower. Precedent in a real thing in courts, but the thing about precedent is it only sets the rules until it doesn’t. Outside of court it’s kind of a meaningless idea.
If the Republicans want to do something they’ll say the Democrats did it first even if the Democrats didn’t do it first. When they are in power they’ll ignore ever complaint they ever made about executive overreach. It was all a lie anyway. They just didn’t like the black guy.