Ari ShapiroAri Shapiro is co-host of All Things Considered, NPR's award-winning newsmagazine.
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.
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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.
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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.