Mitt Romney brushes off accusations by Rick Santorum that he rigged the CPAC straw poll on Fox News Radio on Tuesday. "Does he have any evidence of that, by the way?" asked Romney. "The answer is, of course not. Our participation in CPAC and other polls is the same as in other years, and it's kind of silly on his part. Sometimes when you lose, you cast around looking for excuses ... I'm afraid sour grapes and having lost has generated some unusual places to blame." And while on the subject of Santorum, Romney took the opportunity to mention his competitor's use of earmarks in the Senate, breaking the race down to simply "a big spender versus a guy who balances budgets."