MoveOn.org, the liberal 527 group, has recruited John Cusack, who first made his name holding a Peter Gabriel-blaring boombox above his head, to appear in its latest TV attack ad. According to The Associated Press, the 30-second spot will air on the Bravo network, CNN, MSNBC and Comedy Central — all known for attracting liberal viewers. In the ad, Cusack, set against a rapid-fire succession of different-colored backgrounds, challenges viewers to pick who holds a variety of liberal-unfriendly positions, Sen. John McCain or President George W. Bush. The trick? They both do. The Associated Press reports Cusack, an Obama supporter, decided to jump into the political debate because of his frustration with the war in Iraq.

"I know my opinion doesn’t matter more than anyone else’s and I just make films," [Cusack] told The Associated Press in a phone interview Wednesday. "But I do feel you have to speak out, and that’s what I’m doing."

The ad may entice viewers to check out Cusack’s new film, "War, Inc.," a political satire, which opened in limited release last month to lackluster reviews.