Tough to argue. I think it would honestly be better at this point for everyone, including conservatives, if Trump left
Probably. But I expect conservatives / Republicans are going to experience a sort of sunk cost fallacy with Trump. They're taking the heat for electing him, so they're going to want to get some use out of him before he goes. That will probably lead to more desperate moves, like trying (and probably failing) to repeal Obamacare, again. And they'll back him well past the point where the majority of the public thinks he needs to go, damaging themselves further.