LOL, some weakness? Yes. Insanity? NO! A little weakness is acceptable when you aren’t a trained politician. He is gradually learning, hopefully by 2020 he’ll have it down pat. So McCain, go back to your padded room and play with your crayons.
The only weakness afflicting Trump is the weakness of the party that he is stuck with. Were he a Democrat, he would have puff pieces all day, no one would be investigating anything, especially phony non-crimes, and Congress would do whatever he told them to. Republicans could have supported him the way Democrats (and Republicans) supported Obama, but they don't because they are his and our enemies.