Arlen Specter defected to the Democratic Party because he knew he could not win a Republican Primary. Might he go down in defeat anyway? The Washington Post reports that Former Pennsylvania governor and homeland security chief Tom Ridge is “seriously considering” a 2010 bid for Specter’s seat. That’s bad news for Specter: In one recent poll, he led Ridge 46 to 43 while leading against the Republican who would have beat him in the primary, Pat Toomey, by over 20. In another poll, he trails Ridge by one percent.