Narcissistic Personality Disorder at a minimum.
Indeed
NPD is spot on. I don’t think there is a single symptom he is missing. He is almost a caricature of a narcissist. The constant “I, I, I, me, me, me” is beyond belief and he makes everything about him.
A sociopath is a person who lacks empathy and conscience. I believe he fits this definition, too. What the media spin as “stoic” is really just a lack of emotion and nothing to brag about.
Add in that he’s a bully. I’m not sure what mental health description that falls under. He is quick to mock and criticize when the other person is helpless to defend himself, such as when the other person is absent, or constrained from speaking. But put him toe-to-toe, as in the debate with Romney, and all the bravado vanishes. The next day, at a campaign rally with Romney far away, the bully comes back out.
Zippy is a sick and twisted little man.