In temperment terms, he is not a choleric.
He has no respect for American traditions.
He is not a melancholy
He's just Barry, an orphan with no country, the perennial outsider. A loner who prefers his own company or the anonymity of crowds. In clinical terms, he may be a "secret schizoid" -- outwardly engaged but, in actuality, uneasy around people.
Obama doesn't lose his cool. Aside from the occasional passive-aggressive comment
That might mean that he is a phlegmatic.
Obama comforts himself with pleasures -- parties, golf, vacations.
This is typical of a sanguine.
He is probably a phlegmatic-sanguine blend
How about just a communist/marxist/leninist/islamist?