Going on a TV talk show is one thing. Going on a weirdly awkward comedy web show, acting like government policy is just some new movie you're plugging? Exceedingly strange. But it came out pretty funny.
Best presidential line: "If I ran a third time, it'd be sorta like doing a third Hangover movie. It didn't really work out very well, did it?"
Galifianakis gets a pretty good gag/punchline at the very end, too.