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Team Santorum is on a roll. The presidential hopeful’s campaign has made several hits against Romney’s work as a “Wall Street insider,” his flip-flopping on key issues, and now they’ve even reverted back to the Romney-dog-on-car story as a point of attack against Mitt’s character. “If you can’t be nice to your dog, who you gonna be nice to?” asked Santorum spokeswoman Alice Stewart on MSNBC Monday.