First of all, it's stupid. How likely is a Alito to feel less beholden to the anti-choicers with lone Specter sending a message that he, too, has voted for him?
Secondly, I keep reading in the paper that Specter is "pro-choice" or an "abortion rights moderate" but I see so little evidence of it. He has voted to confirm all of Bush's appointees. I suppose he does it to stave off another challenge from the uber-right Pat Toomey. But, please. Why doesn't he just drop the charade that he actually cares about a woman's right to choose.
UPDATE: Check out what Scott Lemieux writes about Casey Jr. and his endorsement of Scalito.