White House

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In this Feb. 24, 2015, file photo, Danny Ruthenberg-Marshall, left, with 350 DC, and Lindsey Halvorson, a student at American University, pick up their signs after attending gathering with other opponents of Keystone XL oil pipeline in support of a veto of the legislation outside the White House in Washington. (AP Photo/Jacquelyn Martin, File)

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President Barack Obama speaks in the South Court Auditorium in the Eisenhower Executive Office Building on the White House complex in Washington, Thursday, Aug. 6, 2015, on the 50th anniversary of the Voting Rights Act. (AP Photo/Carolyn Kaster)

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Donald Trump and much of his family take the stage on June 16 following his announcement he'd run for the White House (AP Photo/Richard Drew)

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The official White House portrait of Dwight Eisenhower, 34th president

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First lady Michelle Obama welcomed over 130 college-bound high school students to the daylong White House event as part of her Reach Higher initiative. (Associated Press)

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President Obama (center), with Paul Sullivan (left), vice president of international business development at Acrow Bridge, and Susan Jaime, CEO Ferra Coffee International, gestures during his meeting with small-business owners to discuss the importance of the reauthorization of the Export-Import Bank in the Roosevelt Room of the White House on July 22, 2015. (Associated Press)

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The American flag is lowered to half-staff above the White House in Washington, Tuesday, July 21, 2015, to honor the five U.S. service members who were killed by a gunman in Chattanooga, Tenn., last week. (AP Photo/Andrew Harnik)

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President Obama speaks in the East Room of the White House in Washington, Monday, July 13, 2015. (AP Photo/Evan Vucci) ** FILE **

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President Barack Obama speaks during the 2015 White House Conference on Aging, Monday, July 13, 2015, in the East Room of the White House in Washington. The president said a secure retirement is a critical component of what it means to be middle class in America. (AP Photo/Evan Vucci)

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White House press secretary Josh Earnest talks to the media during the daily press briefing on July 6, 2015, in Washington. (Associated Press) **FILE**

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President Barack Obama, accompanied by first lady Michelle Obama, left, arrives to deliver remarks during an Independence Day celebration on the South Lawn at the White House in Washington, Saturday, July 4, 2015. (AP Photo/Andrew Harnik)

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President Barack Obama, accompanied by first lady Michelle Obama, left, delivers remarks during an Independence Day celebration on the South Lawn at the White House in Washington, Saturday, July 4, 2015. (AP Photo/Andrew Harnik)

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Bruno Mars, left, welcomes President Barack Obama to the stage during an Independence Day celebration on the South Lawn at the White House in Washington, Saturday, July 4, 2015. (AP Photo/Andrew Harnik)

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President Barack Obama, accompanied by first lady Michelle Obama, left, speaks during an Independence Day celebration on the South Lawn at the White House in Washington, Saturday, July 4, 2015. (AP Photo/Andrew Harnik)

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(Photo courtesy of The White House)

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Gov. Chris Christie revs up his "Tell It Like It Is" campaign tour; his bid for the White House gets underway Tuesday. (Associated Press)

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The White House is lit up in rainbow colors in commemoration of the Supreme Court's ruling to legalize same-sex marriage on Friday, June 26, 2015, in Washington. (AP Photo/Evan Vucci)

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President Barack Obama walks to the Rose Garden of the White House in Washington, Friday, June 26, 2015, to make a statement after the Supreme Court declared that same-sex couples have the right to marry anywhere in the United States. (AP Photo/Susan Walsh)

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George W. Bush's Scottish terrier, Barney, was the White House pet dog for eight years. He used to chase golf balls on the green at Camp David and guard the South Lawn to the White House like a Secret Service agent, according to a statement Bush gave on Barney's passing in 2013.