The same labor unions which hoped to dog Sen. Arlen Specter in his Republican Primary are now thinking about using the money -- about $100,000 -- to "keep Specter honest" when it comes to the principles of his new party, top Democrats said.  The money might be used to support a Democratic challenger, the Democrats said, speaking on the condition of anonymity. 

Though Specter ruled out voting for cloture on the Employee Free Choice Act, he is now in a position to broker a compromise -- a "new EFCA."

As Ben Smith of Politico reported, a labor 527 polled Pennsylvania and found that Specter's approval ratings were below that of almost any other statewide official. That polling was used to raise money for a planned campaign against him.

Finding a Democrat to challenge Specter will be tough. Several Democrats who were thinking about the race pulled out today. 

A side note: Democrats say three politicians -- Gov. Ed Rendell and Reps. Mike Doyle and Robert Brady -- were in regular contact with Specter as he made his decision.