I think the potential implosion of the Treyvon thing he stuck himself in the middle of is working on his head.
I suspect a lot of things are “working on his head.” For starters, constant travel with repeated air pressure changes can really mess anybody up. Add to that the strong possibilities that he knows he’s going to lose the Obamacare SCOTUS case and that he’s still doing drugs in addition to alcohol, and he could be coming apart. Remember, he’s never suffered any real setbacks in his life before, having had everything greased for him and been told he’s the Great Mahdi come to earth.