Oh, I think his advisers will steer him clear of that. From this side of the big puddle Republicans in general do seem to be a disreputable bunch. However, as time goes on and he gets worse and worse I think many of them will realise what a horrible liability he's going to be in 2020. That could well cause a bit of ship-jumping. But, apropos of impeachment, etc., do you really want Pence instead?