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LOUISVILLE, KY - MARCH, 1:   Republican presidential candidate Donald Trump speaks at the Kentucky International Convention Center March 1, 2016 in Louisville, Kentucky. Trump is campaigning nationwide on Super Tuesday, the single largest primary voting day. (Photo by Aaron P. Bernstein/Getty Images)
LOUISVILLE, KY - MARCH, 1:   Republican presidential candidate Donald Trump speaks at the Kentucky International Convention Center March 1, 2016 in Louisville, Kentucky. Trump is campaigning nationwide on Super Tuesday, the single largest primary voting day. (Photo by Aaron P. Bernstein/Getty Images)

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    Donald Trump's Super Tuesday press conference

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Donald Trump's Super Tuesday press conference

Donald Trump takes questions from reporters at his Super Tuesday campaign headquarters in Palm Beach, Florida.

Donald Trump's Super Tuesday press conference

Donald Trump takes questions from reporters at his Super Tuesday campaign headquarters in Palm Beach, Florida.