State/National Polling Divide

Sean Trende ponders the differences between various swing-state polls that give the president an edge and the various national polling that seems to give the edge to Governor Romney.  Trende points out that national polls have proven more accurate than state polls in the past, which could give some more hope to the Romney campaign.

Also, it is at least very interesting that the map has expanded considerably over the past few weeks in the Romney camp's favor.  Now, Romney is within a few points in Michigan and Pennsylvania, neither of which have gone Republican on the presidential since 1988.  Wisconsin also seems very close.  Romney is eating into Obama's map, suggesting more possible combinations for Romney to get to 270.  Meanwhile, the president's options are narrowing.