Santorum suggested Sunday that Romney won the CPAC straw poll by paying supporters to show up and vote, a tactic he said fellow candidate Ron Paul also has used in the past.

“There’s nothing wrong with that. It’s absolutely a strategy. We just don’t think that’s a good use of our resources, and Gov. Romney, obviously, you know, may have a different idea,” Santorum told CNN Chief Political Correspondent Candy Crowley.

Responding to his comments Sunday, Romney’s campaign said “Santorum has a history of making statements that aren’t grounded in the truth” and pointed to Romney’s win in the Maine caucuses Saturday night, as well as a separate nationwide survey of conservatives conducted by CPAC organizers