The U.S. Capitol at sunrise on Monday, before President Obama's second inauguration. While the president raised big issues in his inaugural address — climate change, gay rights, immigration, the shooting of schoolchildren — none of them appear to top the agenda of Congress, which returned to work Tuesday. Drew Angerer /EPA /Landov hide caption

itoggle caption Drew Angerer /EPA /Landov

Senate Majority Leader Harry Reid, D-Nev. speaks to the media at the Capitol in March. T.J. Kirkpatrick/Getty Images hide caption

itoggle caption T.J. Kirkpatrick/Getty Images