Don't you think that maybe registration is up because Pennsylvania is finally in the spotlight? Also, I fear that a number of the party-switch registration is made up of mischief-making footsoldiers in Operation Chaos, given that most are in central PA (this election, we are all Michael Barone).

I wouldn't count Obama out in PA. This seven-week hiatus in primaries has not been kind to her, and it's just half over. He's campaigning hard, and he's good at it.

Then again, Hillary is well positioned in Kentucky and Indiana the week after (I think), so she may charge ahead and hope for another disaster like the Rev Wright and the Altoona Massacre.