John Mellencamp by Michael Hickey/WireImage.com
has asked presidential wannabe
to cease playing "Our Country" and other songs of his, primarily because the senator's agenda doesn't jive with the singer's. "Are you sure you want to use [John's] music?" a letter from Mellencamp's peeps to McCain reads. "Logic says that the facts might prove to be an embarrassment" - namely that Mellencamp had in fact been backing John Edwards.