Washington

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In this Jan. 26, 2015, file photo, Secret Service officers search the south grounds of the White House in Washington after an unmanned aerial drone was found on the White House grounds during the middle of the night. (AP Photo/Susan Walsh, File)

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House Select Committee on Benghazi Chairman Rep. Trey Gowdy, R-S.C. speaks at a news conference on Capitol Hill in Washington, Tuesday, March 3, 2015, about former Secretary of State Hillary Rodham Clinton using her personal email account for official business. (AP Photo/Susan Walsh) ** FILE **

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Sen. Elizabeth Warren, D-Mass. speaks at the International Association of Firefighters (IAFF) Legislative Conference and Presidential Forum in Washington, Monday, March 9, 2015. (AP Photo/Pablo Martinez Monsivais) ** FILE **

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President Barack Obama speaks at the National League of Cities annual Congressional City Conference in Washington, Monday, March 9, 2015. (AP Photo/Jacquelyn Martin)

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Rep. Donna Edwards, D-Md., is flanked by House Minority Leader Nancy Pelosi, D-Calif., left, and Rep. Steve Israel, D-N.Y., right, speaks to reporters after Pelosi announced that Edwards will become co-chair of the House Democrats’ Steering and Policy Committee with Rep. Rosa DeLauro, D-Conn., during a news conference at the Capitol in Washington, Monday, Nov. 17, 2014. (AP Photo/J. Scott Applewhite)

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President Obama speaks at the White House in Washington on March 1, 2013. (Associated Press)

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President Obama speaks in the East Room of the White House in Washington on March 3, 2015. (Associated Press) **FILE**

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Washington Capitals left wing Curtis Glencross (22) sends the puck past Minnesota Wild defenseman Matt Dumba (55) during the first period of an NHL hockey game Thursday, March 5, 2015, in Washington. (AP Photo/Alex Brandon)

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Brenda Robinson, the first black female naval aviator, keynotes the NAVSEA African-American History Month program in Washington as a slide show of her career plays on the video wall behind her. (U.S. Navy Photo/Released)

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President Barack Obama hosts a lunch with My Brother's Keeper mentees in the Map Room of the White House in Washington int his Feb. 27, 2015, file photo. (AP Photo/Evan Vucci)

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The field is readied before a baseball home opener between the Washington Nationals Atlanta Braves at Nationals Park Friday, April 4, 2014, in Washington. (AP Photo/Alex Brandon)

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Attorney General Eric Holder speaks at the Justice Department in Washington on March 4, 2015, about the Justice Department's findings related to two investigations in Ferguson, Mo. (Associated Press) **FILE**

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FILE - In this Feb. 25, 2015 file photo, the Homeland Security Department headquarters in northwest Washington, Tuesday, Feb. 24, 2015. on Wednesday, President Barack Obama signed a law funding the Homeland Security Department through the end of the budget year. (AP Photo/Manuel Balce Ceneta, File)

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Attorney General Eric Holder speaks at the Justice Department in Washington, Wednesday, March 4, 2015, about the Justice Department's findings related to two investigations in Ferguson, Mo. (AP Photo/Carolyn Kaster)

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Demonstrators stand outside the Supreme Court in Washington, Wednesday, March 4, 2015, as the court hears arguments in King v. Burwell, a major test of President Barack Obama's health overhaul which, if successful, could halt health care premium subsidies in all the states where the federal government runs the insurance marketplaces. (AP Photo/Pablo Martinez Monsivais)

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White House press secretary Josh Earnest speaks during his daily news briefing at the White House in Washington, Wednesday, March 4, 2015, where he answered questions including on Iran, and about former Secretary of State Hillary Clinton's use of email. (AP Photo/Jacquelyn Martin)

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Israeli Prime Minister Benjamin Netanyahu waves as he speaks before a joint meeting of Congress on Capitol Hill in Washington, Tuesday, March 3, 2015. (AP Photo/Susan Walsh)

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In this March 3, 2015, photo, President Barack Obama speaks about Iran and Israeli Prime Minister Benjamin Netanyahu's speech to Congress during a meeting with Defense Secretary Ashton Carter in the Oval Office of the White House in Washington. (Associated Press) **FILE**