Senate Majority Leader Mitch McConnell of Kentucky returns to his office on Capitol Hill in Washington on Jan. 29, 2015. J. Scott Applewhite/AP hide caption

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U.S. Senate Majority Leader Sen. Harry Reid, shown walking towards the Senate chamber on December 16, pushed through a final batch of judicial nominees this month, before the Republican-dominated Senate takes over in the new year. Alex Wong/Getty Images hide caption

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An IKONOS satellite image of a facility near Kabul, Afghanistan, on July 17, 2003, shows what is reportedly the largest CIA covert prison in Afghanistan, code-named the Salt Pit. Reuters/Landov hide caption

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Virginia Republican Senate candidate Ed Gillespie, accompanied by his wife, Cathy, concedes in his Virginia Senate race against the Democratic incumbent, Sen. Mark Warner, on Friday in Springfield, Va. Cliff Owen/AP hide caption

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Senate Majority Leader Harry Reid, D-Nev., cited the bad December jobless numbers as a reason Congress should extend federal unemployment insurance. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP