ATF agents search last week for evidence at the site of the fire and explosion in West, Texas. Tom Reel/The San Antonio Express-News/AP hide caption

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House Speaker John Boehner speaks to the media during his weekly news conference on Capitol Hill on April 18. Mark Wilson/Getty Images hide caption

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New York City Mayor Michael Bloomberg speaks at a news conference at City Hall on April 25. The billionaire mayor has been spending from his personal fortune to provide a "political counterweight to the NRA," his policy adviser says. Spencer Platt/Getty Images hide caption

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Travelers stand in line at Los Angeles International Airport on Monday. Congress moved quickly this week to give the Federal Aviation Administration flexibility to end air traffic controller furloughs that resulted in flight delays at several airports. Damian Dovarganes/AP hide caption

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Republican U.S. Senate candidate Dan Winslow of Massachusetts wants same-sex married couples to have the same right to pool their money for political donations as other married couples. But the Federal Election Commission says the Defense of Marriage Act won't allow it. The constitutionality of DOMA is now before the Supreme Court. Charles Krupa/AP hide caption

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Former Arizona Rep. Gabrielle Giffords and her husband, Mark Kelly, at an April 16 ceremony naming a Capitol Hill conference room for her aide Gabe Zimmerman. Zimmerman died in the same Tucson, Ariz., shootings that Giffords wounded. Saul Loeb/AFP/Getty Images hide caption

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Sen. Susan Collins, a Maine Republican, and fellow GOP senators accused the Obama administration of creating a "manufactured crisis" by furloughing FAA air traffic controllers and causing delayed flights. J. Scott Applewhite/AP hide caption

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Senate Finance Committee Chairman Max Baucus, a Montana Democrat, will not seek a seventh term in 2014. J. Scott Applewhite/AP hide caption

itoggle caption J. Scott Applewhite/AP

Sen. Chuck Schumer, D-N.Y. (right), talks during a hearing at which he angered Sen. Chuck Grassley, R-Iowa (far left). Grassley thought Schumer was accusing him of using the Boston bombings as an excuse to slow or kill the immigration overhaul. J. Scott Applewhite/AP hide caption

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Passengers check their flight status at Los Angeles International airport on Monday. The FAA said staffing cuts were causing delays in the Eastern U.S. Damian Dovarganes/AP hide caption

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People line up to enter the Supreme Court on Monday for arguments. Mark Wilson/Getty Images hide caption

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Sen. Joe Manchin, D-W.Va., meets in his office last week with families of victims of the Sandy Hook Elementary School shooting in Newtown, Conn. A bipartisan plan to expand background checks for gun buyers was defeated Wednesday in the Senate. J. Scott Applewhite/AP hide caption

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Senate Majority Leader Harry Reid, D-Nev., speaks after losing a vote on broader background checks for gun buyers, Wednesday at the Capitol. Evan Vucci/AP hide caption

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