White House Correspondents' Association

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President Barack Obama arrives at the White House Correspondents' Association (WHCA) Dinner at the Washington Hilton Hotel, Saturday, May 3, 2014, in Washington. (AP Photo/Jacquelyn Martin)

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First lady Michelle Obama arrives at the White House Correspondents' Association (WHCA) Dinner at the Washington Hilton Hotel, Saturday, May 3, 2014, in Washington. (AP Photo/Jacquelyn Martin)

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President Barack Obama, right, has outgoing Health and Human Services Secretary Kathleen Sebelius come on stage as part of a joke to fix a technical glitch at the end of his speech during the White House Correspondents' Association (WHCA) Dinner at the Washington Hilton Hotel, Saturday, May 3, 2014, in Washington. (AP Photo/Jacquelyn Martin)

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President Barack Obama laughs as actor and comedian Joel McHale speaks during the White House Correspondents' Association (WHCA) Dinner at the Washington Hilton Hotel, Saturday, May 3, 2014, in Washington. (AP Photo/Jacquelyn Martin)

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President Barack Obama speaks during the White House Correspondents' Association (WHCA) Dinner at the Washington Hilton Hotel, Saturday, May 3, 2014, in Washington. (AP Photo/Jacquelyn Martin)

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President Barack Obama gestures while speaking during the White House Correspondents' Association (WHCA) Dinner at the Washington Hilton Hotel, Saturday, May 3, 2014, in Washington. (AP Photo/Jacquelyn Martin)

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Actor and comedian Joel McHale, pictured at the 2014 White House Correspondents' Association dinner, again honors fellow funnyman Robin Williams on Friday night on his E! TV show "The Soup." (AP Photo/Jacquelyn Martin)

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President Barack Obama, left, speaks during the White House Correspondents' Association (WHCA) Dinner at the Washington Hilton Hotel, Saturday, May 3, 2014, in Washington. (AP Photo/Jacquelyn Martin)

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President Barack Obama gestures and smiles during his speech at the White House Correspondents' Association (WHCA) Dinner at the Washington Hilton Hotel, Saturday, May 3, 2014, in Washington. (AP Photo/Jacquelyn Martin)

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First lady Michelle Obama laughs while listening to President Obama's speech during the White House Correspondents' Association (WHCA) Dinner at the Washington Hilton Hotel, Saturday, May 3, 2014, in Washington. (AP Photo/Jacquelyn Martin)

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President Barack Obama laughs as actor and comedian Joel McHale speaks during the White House Correspondents' Association (WHCA) Dinner at the Washington Hilton Hotel, Saturday, May 3, 2014, in Washington. (AP Photo/Jacquelyn Martin)

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First lady Michelle Obama, center, takes her seat with Joel McHale, star of the NBC series Community, at left, and President Barack Obama, at right, during the centennial dinner of the White House Correspondents' Association (WHCA) at the Washington Hilton Hotel, Saturday, May 3, 2014, in Washington. (AP Photo/Jacquelyn Martin)