Sen. Arlen Specter (D-PA) pauses as he gives his concession speech to supporters on Tuesday in Philadelphia. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP

Sen. Jim Bunning (R-KY) listens during a hearing on “Economic and Budget Challenges for the Short and Long Term” before the Senate Budget Committee on Capitol Hill March 3. Alex Wong/Getty Images hide caption

itoggle caption Alex Wong/Getty Images