Several head-to-head polls of likely voters now show McCain beating Obama, and McCain’s favorable/unfavorable ratings are each a couple points stronger to boot. There is also evidence that Obama might be incredibly vulnerable in several key battleground states. In spite of a dozen straight losses and weeks of bad news, Hillary Clinton continues to lead Obama by 5 points in both Ohio and Pennsylvania. Clinton’s victory in these primaries may not reverse her epic fall, but it might foreshadow a decisive victory for McCain in the general election. That the Keystone State is very much in play should also bolster claims that McCain is giving a strong look at Tom Ridge as a running mate.