Why Is Barack Obama Going on Letterman?

Why the hell is Barack Obama going on David Letterman this Monday???

I mean instead of trying to smile your way to better approval ratings for a failed health-care push, why don't you try fixing the damn thing first?

Or I have an idea... why don't you make a cool, night vision sex tape with Paris Hilton. And that way you can become a true celebrity and forget about the whole, "Leader of the Free World" thing.