Donald Trump

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Republican presidential candidate Donald Trump takes a photo with a supporter after a rally in Spokane, Wash., Saturday, May 7, 2016. Trump spent a second day in the Northwest on Saturday, telling supporters he'd win Washington state in November and decrying manufacturing job losses. (AP Photo/Ted S. Warren)

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Republican presidential candidate Donald Trump speaks during a rally in Spokane, Wash., Saturday, May 7, 2016. Trump spent a second day in the Northwest on Saturday, telling supporters he'd win Washington state in November and decrying manufacturing job losses. (AP Photo/Ted S. Warren)

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Illustration on media pegging profit to Donald Trump's comments by Alexander Hunter/The Washington Times

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In this June 27, 2012, file photo, Donald Trump stands on the 14th fairway during a pro-am round of the AT&T National golf tournament at Congressional Country Club in Bethesda, Md. (AP Photo/Patrick Semansky, File)

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In this Wednesday, April 6, 2016, file photo, Republican presidential candidate Donald Trump speaks during a campaign rally, in Bethpage, N.Y. Trump says he would create coal-mining jobs as president, and he criticizes Hillary Clinton for saying “we’re going to put a lot of coal miners” out of work. Trump, however, has yet to explain exactly how he will revitalize Appalachia’s coal industry. (AP Photo/Julie Jacobson, File)

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FILE - In this Wednesday, April 6, 2016, file photo, Republican presidential candidate Donald Trump speaks during a campaign rally, in Bethpage, N.Y. Trump says he would create coal-mining jobs as president, and he criticizes Hillary Clinton for saying “we’re going to put a lot of coal miners” out of work. Trump, however, has yet to explain exactly how he will revitalize Appalachia’s coal industry. (AP Photo/Julie Jacobson, File)

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Donald Trump claims to have a $10 billion fortune. But much of his wealth is tied up in real estate that he would have to sell or take loans against to pay off the next six months of campaigning. (Associated Press)

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In this Sunday, May 1, 2016, file photo, Republican presidential candidate Donald Trump reacts to a song during a campaign rally at the Indiana Theater in Terre Haute, Ind. (AP Photo/Seth Perlman) ** FILE **

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In this Sunday, May 1, 2016, file photo, Republican presidential candidate Donald Trump reacts to a song during a campaign rally at the Indiana Theater in Terre Haute, Ind. (AP Photo/Seth Perlman) ** FILE **

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President Obama president made several jokes at Donald Trump's expense Saturday at the White House Correspondents' Dinner. "They say Donald lacks the foreign policy experience to be president. But in fairness he has spent years meeting with leaders from around the world: Miss Sweden, Miss Argentina, Miss Azerbaijan," he said. (Associated Press)

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Republican presidential candidate Donald Trump speaks during a campaign stop Monday, May 2, 2016, in South Bend, Ind. (AP Photo/Charles Rex Arbogast)

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Republican presidential candidate Donald Trump arrives for a rally, Thursday, April 28, 2016 in Costa Mesa, Calif. (AP Photo/Chris Carlson)

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Republican presidential candidate Donald Trump speaks during a campaign stop at Old National Events Plaza, Thursday, April 28, 2016, in Evansville, Ind. (AP Photo/Darron Cummings)

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In this Wednesday, April 27, 2016 photo, Republican presidential candidate Donald Trump gives a thumbs up after giving a foreign policy speech at the Mayflower Hotel in Washington. He's become one of the most closely scrutinized people on Earth, but until this week nobody really knew what policies and actions Trump would pursue for the world at large if he elected president. (AP Photo/Evan Vucci, File)

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Republican presidential candidate Donald Trump gives a foreign policy speech at the Mayflower Hotel in Washington, Wednesday, April 27, 2016. Trump's highly anticipated foreign policy speech Wednesday will test whether the Republican presidential front-runner, known for his raucous rallies and eyebrow-raising statements, can present a more presidential persona as he works to unite the GOP establishment behind him. (AP Photo/Evan Vucci)