Mitt Romney has a multi-trillion dollar tax cut plan that he says won't add to the deficit. How does that work? He won't say, other than to pledge that he'd close some loopholes and deductions, but that none of those would harm "middle-class" Americans. Analysts have argued that this is not mathematically possible. So how do you factcheck that? That was the task for CBS Evening News last night (10/15/12). And their answer seemed to boil down to: Well, maybe. CBS reporter Wyatt Andrews explained: "Romney argues that lower rates will stimulate the economy and he is emphatic the middle-class [...]