I don't think Trump will be impeached but section 4 of the 25th Amendment lays it out pretty well. If Pence and Trump's cabinet REALLY wanted to they could oust him. If you look at the political chess board right now in the context of the Amendment, the only thing that's keeping them from doing this is the insane amount of backlash they would receive right now. In a few months, it could very well be different. Not that I think it will.