President Obama shakes hands with his nominee to head the Defense Department, former Sen. Chuck Hagel, at the White House on Jan. 7. John Brennan, Obama's choice for director of the CIA, looks on. Alex Wong/Getty Images hide caption

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President Obama gives his first inaugural address on Jan. 20, 2009. Ron Edmonds/AP hide caption

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Vice President Joe Biden leads the first meeting of the working group to explore solutions following the Newtown shooting with Philadelphia Police Commissioner Charles Ramsey and other law enforcement leaders on Dec. 20. Chip Somodevilla/Getty Images hide caption

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"I'm optimistic we may still be able to reach an agreement that can pass both houses in time," the president said after meeting with congressional leaders at the White House on Friday. Evan Vucci/AP hide caption

itoggle caption Evan Vucci/AP