What's the matter with Pennsylvania? That question, or the implication of it, was embedded near the end of my last post looking at whether President Obama faces an "Ohio versus Virginia" choice in plotting a path to reelection. While all this political geography is still fresh in my mind, before the latter is benumbed by the Thanksgiving repast, I figured I ought to take up the question more directly. Here's the deal: polls at this point are of course to be taken with big rocks of sea salt, but there was a disconcerting one for Obama yesterday showing him tied...