Here is poll watcher Nate Silver's take on yesterday's numbers: The national tracking polls showed John McCain gaining some ground yesterday, but the state polls continued to favor Barack Obama. Both Gallup and Rasmussen showed McCain narrowing the national gap, but – big outlier here – a new poll from the reputable Pew had Obama up 15. Meanwhile, state polls confirmed Obama's growing strength in Virginia, Colorado and Nevada. The sole silver lining for John McCain is the fact that his deficit in Pennsylvania, calculated in two polls at seven and eight percent, has dropped into the single digits. In a separate post, Silver says that the McCain's stated "saving grace" of undecided voters will probably only net him one point.