Applying the universal +5 Rassy rule... I think we have a consensus, folks. Romney has good reason to be pouring cash into PA, WI, MI, and MN.
Based on the polling, this looks to be Romney's current best case scenario, Obama 277, Romney 261:
He needs at least another 8, preferably 9 EVs carved out of Obama somewhere. PA, WI, MI, and MN are all longshots for Romney, but they could win Romney the White House if he doesn't slip up somewhere else, and he doesn't seem to be making the case in Ohio. Of those four Wisconsin is the most likely to be swingable, but even if he gets the Buckeye State, he has to hope he doesn't lose one of the tossups I've assigned to him.