This guy, my first impression of him made me think of a Star Trek alien. Surprised he won over Dr. Oz but figured people wanted someone left leaning. Then he was out on leave for depression, then speeding, drinking and driving. Had a stroke.
He really did not seem mentally or physically stable even if he was a Democrat and seemed like he needed to resign. Now I find out he has decided to become a Republican. Makes sense.
Stressed out and freaked out. The safest place for him to be in his mind right now is with the party that would otherwise be out to get him. Easier to sell out and catch a ride than to march uphill.