"From the creator of 'I'm Running For Office for Pete's Sake' comes the story of two men trapped in the same body — Mitt versus Mitt." It sounds like a movie trailer, but it's really the latest political ad from the Democratic National Committee. The DNC is reportedly spending $22,000 to run the ad this week. Among the GOP presidential candidates, Rick Perry has already spent $2.8 million on advertising, Ron Paul has spent $2.1 million, Mitt Romney has spent $134,000, and Herman Cain has spent $78,900. But what kind of poll numbers does one TV spot really buy?