Supreme Court justices will hear arguments Tuesday on California's Proposition 8 ban on same-sex marriage. On Wednesday they'll hear arguments on the federal Defense of Marriage Act, which defines marriage as between one man and one woman. Nicholas Kamm/AFP/Getty Images hide caption

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Texas Republican Ted Cruz, then senator-elect, speaks to reporters before a freshman senators luncheon on Nov. 13. Harry Hamburg/AP hide caption

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President Obama speaks to reporters Friday at the White House after he met with congressional leaders regarding the sequester. "Even with these cuts in place, folks all across this country will work hard to make sure that we keep the recovery going," said Obama. "But Washington sure isn't making it easy." Charles Dharapak/AP hide caption

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Rep. Bob Goodlatte, R-Va., checks his phone before a hearing on Capitol Hill in September. Chip Somodevilla/Getty Images hide caption

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Sen. Marco Rubio, R-Fla., speaks during a fundraiser in Altoona, Iowa, on Nov. 17. He is delivering the GOP response to President Obama's State of the Union address Tuesday night. Charlie Neibergall/AP hide caption

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President Obama greets law enforcement officers after speaking on ideas to reduce gun violence at the Minneapolis Police Department Special Operations on Monday. Pablo Martinez Monsivais/AP hide caption

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Jeff Torgerson (top) and Dan Volkman browse the selection of rifles at Mainstream Firearms and Marine in Winona, Minn., on Monday. Andrew Link/Winona Daily News/AP hide caption

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Sen. Marco Rubio, R-Fla, is among a bipartisan group of eight senators who this week announced a plan to overhaul the nation's immigration laws. Charlie Neibergall/AP hide caption

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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

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Los Angeles County Sheriff's Department officer Jay Phillippi looks over a fully automatic Thompson machine gun that was turned in during a "Gifts for Guns" program in Compton, Calif., in 2005. Chris Carlson/AP hide caption

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Senate Majority Leader Harry Reid, D-Nev., left, and Senate Minority Leader Mitch McConnell, R-Ky., have talked about a deal to change the Senate's filibuster rules. J. Scott Applewhite/AP hide caption

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House Speaker John Boehner swears in the newly elected members of the 113th Congress on Thursday. Mark Wilson/Getty Images hide caption

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Senate Minority Leader Mitch McConnell, R-KY, leaves the Senate chamber to caucus in the Capitol on Sunday. Molly Riley/AFP/Getty Images hide caption

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House Speaker John Boehner arrives at the White House on Friday for talks with President Obama and congressional leaders aimed at avoiding the "fiscal cliff." Mandel Ngan/AFP/Getty Images hide caption

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Sen. Joe Manchin, a West Virginia Democrat, has an "A" rating from the NRA, but questions why anyone would need the kind of semi-automatic assault rifle used in the Newtown, Conn., killings. Dave Martin/AP hide caption

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