Is Trump actually smart or just the greatest puppet of all time?

I mean he goes back on his word as if he forgets that he set up the trade deal with the Canada that he is now crapping over.

He has bankrupted many of his businesses.

I mean, sure he is successful dismantling all the right institutions to work in his favour but is it really him the brains behind it or is he just sociopathic enough to go along with it?