I don’t think President Trump needs to do anything. He can’t be fired, except by voters in the next election. He has no customers as a business enterprise does. Nothing before the inauguration could generate impeachment proceedings. There seem to be no civil suits regarding any alleged behavior.
And he has no sense of shame. His personal behavior has been all over the media for decades, and that’s they way he likes it.
I've been hammered in other threads for saying exactly that.
Constitutionally it is a correct statement. In reality this will be a battle of public opinion, not law.