Trump is certainly crazy. Smart is up for debate. (Not that Hillary is a great choice for President, either.) He’s either a madman, or very good at acting like a madman. His pronouncements are all empty populist bluster. He has no plans on how to accomplish any of his goals, and his goals seem to be based mostly on whim.
http://www.theyeshivaworld.com/coffeeroom/topic/vermin-supreme-for-president