Letterman Has "Fun" with Mellencamp

John Mellencamp, who did a lot of serious work on behalf of Barack Obama's historic presidential campaign, was linked with the President-elect in a humorous vein by David Letterman on Friday's installment of "Late Night."

During his "Fun Facts" segment, Letterman related that for the first years of his political career, Obama went by the name "Barack Cougar Obamacamp."