As has been extensively commented on, three Republicans effectively gave Obama his stimulus bill. Any one of them could have stopped it. But they didn't. It now would appear that the first of these senators to face reelection, Senator Arlen Specter, will be facing a primary challenge for the Republican nomination.

http://thehill.com/leading-the-news/report-toomey-to-challenge-specter-again-2009-03-05.html

Former Rep. Pat Toomey (R-Pa.) will challenge Sen. Arlen Specter in a primary for the second straight cycle, according to Pennsylvania GOP sources.

The Allentown Morning Call reported Thursday that two friends of Toomey's have said the Club for Growth chief has decided to enter the race.

A Pennsylvania GOP source confirmed that he has talked to Toomey in recent days, and Toomey said he would run.

Back during the stimulus debate, I actually contacted the Club for Growth (in my attempt to reach Toomey) and indicated that I'd be willing to contribute to Toomey's campaign if he ran. I received a response back that, at that time, Toomey didn't appear to be planning to run, but that he'd pass along my thoughts. It now seems he's changed his mind. And I'm sure I'm the one that convinced him (just kidding).

If this turns out to be accurate, it means in 2010 we can all contribute to Toomey's primary campaign. If he wins the Republican nomination, Specter's out. And that's exactly what needs to happen to Republicans that don't vote conservatively.

Update 4/29/2009: The threat of a primary challenge was too much. Rather than answer to his core constituents, Arlen Specter has announced that he is now a Democrat. Not surprising. He already was one for all practical purposes.