At Cafe Hayek if you click on August 2008, then search "campaigning" you should find a link to "Time for Some Campaigning," a spoof on the 2008 election. This video is by JibJab. If you go to their website they have a spoof on the 2004 election which you should watch (the whole way through, literally) and they have "Time for Some Campaigning." The spoof on the 2004 election is called "This Land." There is a little bit of bad language, but only twice and it's not the worst bad language. I think it's hysterical, for all you libertarians out there.
(HT: My friend Miss Candace, aka Candace Smith).