Granted, polls are just a snapshot in time, subject to change, don’t forget the margin of error and all the usual caveats. But McCain can’t be surging to a tie nationally while also falling further behind in the battleground states. Mathematically, it just doesn’t work. Somebody is wrong about which way the race is trending.
UPDATE: Nate Silver has some interesting analysis of this morning’s battleground state polls that may help explain the discrepancy.