Trump's pathology is undeniable. Does it actually make him unfit? I guess it remains to be seen. He's obviously not going to be removed from office.
I'm from the school of thought that we're all a little crazy, and just about everyone has their own thing. Trump is a real cartoon character, though. People say that CNN is way over the top about him, but I think they're actually pretty deferential considering what a lunatic he is.
No one really talks much about it, but there is clearly a different standard for him. It's kind of a "oh, that's just Trump" standard. No Dem or even Republican would get away w/ his constant stream of lies, exaggerations, insults and just general bizarre behavior.