You know how Republicans often have trouble coming up with campaign songs by artists who are cool with having their song used by Republican candidates? John McCain needs a song by a Republican (or at least a Republican-leaner). So I think he should use the theme from "Team America: World Police."
Imagine it. You're a Republican, you're sitting at a campaign rally, waiting for McCain to show up, getting kinda bored and thinking about how screwed your party is in November, when suddenly McCain bursts onto the stage amid Trey Parker's screaming "America! FUCK YEAH!" How could you not get fired up by that? And wouldn't a significant portion of the 18-30 demographic vote for McCain just on the basis of that song? McCain should do this. Now.