Now he's attacking Gingrich's wealth. Allahpundit analyzes:
He brought up Newt’s Tiffany expenses not once but twice today, first with CBS and then again during his radio chat with Hannity this afternoon. (Audio here.) At first blush this looks like he’s pulling a tu quoque as damage control following his dopey $10,000 bet offer at the debate on Saturday night, but I don’t think he’s worried much about that. It was tin-eared, and the competition’s bound to tweak him for it, but the election won’t turn on goofy stage theatrics. What’s panicking him, I think, was Gingrich’s attack on Monday about him “bankrupting companies and laying off employees over his years at Bain.” Kennedy used that against Romney in 1994 with great success and the class-warrior-in-chief is going to hammer him relentlessly for it in the general if Mitt makes it that far.