"He's not just a half-bubble off.."
The dude is certifiably crazy.

The folks standing behind him at his rally in Michigan looked like people in some sort of sociological experiment. At times, they looked confused and uncomfortable.

Step right up! Enter into the big tent in the middle of the circus! See the insane person! Watch him strut across the stage like Mussolini, enjoying the praise heaped upon him. Watch him call people names and be rude and crude. Watch him attack dead people! Watch him do things that he thinks are funny. How do you know insanity? It is so far beyond the bounds of normalcy, that people cannot identify with the words or actions. The only reaction is to laugh nervously until the show is over.

We have a criminally insane person in the White House.