Sources tell Hotline that Sen. Arlen Specter (R-PA), who faces a primary challenge from the right and has seen his poll numbers erode of late, will announce today that he is switching parties.
Specter was one of three Republicans to back Pres. Obama‘s economic stimulus plan. And while the NRSC’s chairman, Sen. John Cornyn (R-TX), has said Specter will have the committee’s full support, challenger Pat Toomey, former president of the Club for Growth, could weaken him en route to the general election.
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