Rick Santorum Really Doesn't Like Mitt Romney Much

| Mon Apr. 2, 2012 12:34 PM EDT

I know that conventional wisdom says that primary contenders can hold hands and sing Kumbaya in the fall no matter what they've said about each other in the spring. But Rick Santorum sure seems bound and determined to perform a destruction test on this conventional wisdom. This ad, especially by Republican lights, is just brutal.

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