Hey, don't pick on our President.
There's good reason to believe that he's suffering from drug- and alcohol-induced brain damage, and other physical debilitation. Notice how he keeps falling off bicycles, Segways, and even living-room couches? Notice how he was rigged up with an electronic device (during the presidential debates) which was either a prompting mechanism or a device for medical monitoring, defibrillating, or the like?
This guy is not 100%, mentally or physically.