You've delivered Harry Reid his 60th Democrat. Specter is officially switching parties.
UPDATE: Other than the pure schadenfreude, the best part of the switch is that the PA primary dynamics have now completely changed. Prior to today, Specter was being pulled unwillingly to the right by the pressure to win the median Republican voter.
Now, he's going to have to run in a Democratic primary -- which means that he'll be competing for the median Democratic voter. That's a big, big change. And that means, for the next year or so, he'll probably be pulled unwillingly (yet deliciously) to the left. It's a complete 180.
And finally, I'm sure Specter is (like me) enjoying the prospect of putting an absolute whoopin' on Toomey in the general.