McCain has difficulty finding a tune.

During last night's Republican convention, the sound system erupted with what is, IMO, the best rock and roll song ever - Chuck Berry's Johnny B. Goode. Berry hasn't formally objected to the use of his song, but he's made it clear that he prefers Obama.
In the meantime, the Republicans are also try to adopt a Van Halen tune, Right Now. The band objects. The songwriter, formely VH frontman, Sammy Hagar, doesn't mind so much, but the current band, re-formed with David Lee Roth, doesn't like the idea of any party using the song for political purposes.
Update: Washed-Up 80's Rockers Clamor for McCain-Palin Infringement