woah..
Well, public figures are considered fair game for more or less anything, particularly games. In general, the judgment is that a politician has chosen to be in the public eye and does not have the same rights so far as what can or cannot be shown publicly about themselves.
[On an offshoot: Honestly, I'm impressed with the guy. I liked a lot of the stuff he said in his campaign, but figured it was a load of BS. He seems to be trying to actually keep his word. In a politician, this is a miracle.
I do have an issue with him being called African American.. his American half isn't African and his African half isn't American, but from the research I've done into the whole citizenship fiasco, it seems that he was born in Hawaii after it became a state, to an American mother, and is, therefore, a natural-born citizen. But yea, like I said, side rant.)
Point being that the game is perfectly legal, and while it may be in poor taste, it's not technically unethical. (I know there shouldn't *really* [ahem, and by *really* I mean, um, technically] be technicalities to ethics, but there's still a technical freedom of speech thing attached to anything making fun of a politician.) It probably attracts plenty of attention, which is the purpose of an advertisement. They're not meant to be tasteful; tackiness attracts more attention.