From the same link.

"While the Wilsons are clearly upset, "Barracuda" co-writer and former Heart guitarist Roger Fisher (Nancy's ex) has a different outlook. He's happy to receive the publicity, he told Reuters last week, and he pledged to give part of the royalties from the song's use to Democratic presidential nominee Barack Obama's campaign."

Thanks McCain for the contribution to Obama's campaign.

Seriously why would McCain even want to use a song which the writers/singers of said song don't want him to use? Why are they having problems finding songs to use that the writers/singers will approve? Why not ask them first?