McCain's Poll Problem

Another day, another shock poll (to borrow Drudge’s phrase) showing the race tightening. Yesterday, Mason-Dixon had John McCain closing to within four points in the battleground state of Pennsylvania. But the oracular pollwatcher Nate Silver points out that the poll is an outlier; two other PA polls had Obama up 12 and 13 points yesterday. A second moment of angst for Obamaphiles: a Fox survey showed McCain within three points nationwide. Well, Fox’s sample included a high number of Republicans. So far, Silver sees no evidence the race has “tightened materially.”