Stephen Colbert’s super PAC is running an attack ad on a CBS station in South Carolina, making his organization "officially legitimate," reports The New York Times’ The Caucus blog.

The 60-second commercial calls Romney a serial killer.

Based on Romney’s remark that "corporations are people," the ad says Romney’s work at Bain Capital makes him a serial killer, the story notes. "As head of Bain Capital, he bought companies, carved them up and got rid of what he couldn’t use," the ad says. "He’s Mitt the Ripper.”

Here’s the ad: