A drawing of the first White House designed by architect James Hoban, who won the competition to design the president's new house in 1792. Building began that year and ended in 1800. AP hide caption

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Slave Labor And The 'Longer History' Of The White House

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First lady Michelle Obama acknowledges the crowd before delivering her speech during the Democratic National Convention in Philadelphia on Monday. Joe Raedle/Getty Images hide caption

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Reince Priebus, chairman of the Republican National Committee, speaks to the delegates on start of the first day of the Republican National Convention. An estimated 50,000 people are expected in Cleveland, including hundreds of protesters and members of the media. Alex Wong/Getty Images hide caption

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First Lady Michelle Obama wears her signature cardigan while dancing with performers from the television show So You Can Dance during the annual White House Easter Egg Roll on April 6, 2015. Mark Wilson/Getty Images hide caption

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Mrs. Obama Saves The Cardigan: 'The Obama Effect' In Fashion

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President Obama and first lady Michelle Obama, shown here in September, will deliver keynote addresses at the SXSW Interactive and Music festivals, respectively. Mandel Ngan/AFP/Getty Images hide caption

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