the president responded today. >> last night governor romney ruled out raising a dime of taxes on anybody ever no matter how much money they make, he ruled out closing the loophole that gives oil companies $4 billion in corporate welfare. and when he was asked what he'd actually do to cut the deficit, and reduce spending, he said he'd eliminate funding for public television. we didn't know that big bird was driving the federal deficit. but that's what we heard last night. the fact is governor romney's math just doesn't add up. >> the math doesn't add up? umm. maybe mr. romney needs a little sesame street. joining me now is david corn, washington bureau chief for mother jones, and an msnbc political analyst, and michelle cottle, washington correspondent