Santorum: GOP presidential race isn't over with SC primary

Rick Santorum predicted the Republican presidential race won't be over with the South Carolina primary.

"Obviously the sooner this could be a two-person race the better. But there's time, I mean — this race isn't going to be over in South Carolina," he said to the Christian Broadcasting Network's David Brody.

Newt Gingrich's campaign sent out an email to supporters Wednesday that included a warning that South Carolina was the last chance to stop Mitt Romney from winning the Republican presidential nomination.

"There’s no more time for talking about stopping Mitt Romney," Gingrich's campaign wrote in the email. "We’re going to do it next week in South Carolina or he’s almost certain to be the Republican nominee, whether conservatives like us want it or not. It’s up to you, right now."

In the same interview Santorum cast down the idea that Romney would be "unstoppable" if he won the South Carolina primary, which is scheduled for Jan. 21.

"As much as the media would like to have you believe that 'oh, he'll be unstoppable,' " Santorum continued, "they've said he's unstoppable before a vote was cast and that he was gonna win Iowa. Well, he sort of won Iowa. I think the big winner of Iowa was us."

A recent Public Policy Polling survey found Santorum in third place among Republican voters with 18 percent, trailing Romney at 27 percent and Gingrich at 23 percent.