New Paul S.C. ad hits Santorum on 'betrayal'

Ron Paul's campaign is out with this new ad in South Carolina, which hits Rick Santorum on his "record of betrayal."

"One serial hypocrite exposed," the ad says, showing clips of Newt Gingrich. "Now another has emerged: Rick Santorum, a corporate lobbyist and Washington politician. A record of betrayal."

This is the first time Paul has hit Santorum on TV so far, and looks a great deal like the anti-Gingrich ads the Paul camp ran in Iowa. Those ads helped bring Gingrich's numbers down before the caucuses, and brutal ads from a campaign that has money to spend could have a similar effect on Santorum.

The Paul campaign is spending $250,000 on the ad buy, a source tells us, and the ad will run in South Carolina starting Monday.