LAS VEGAS, NV - DECEMBER 14: Republican presidential candidate Donald Trump speaks during a campaign rally at the Westgate Las Vegas Resort & Casino on December 14, 2015 in Las Vegas, Nevada. Donlad Trump is campaigning in Las Vegas a day ahead of the final GOP debate. (Photo by Justin Sullivan/Getty Images)
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How Donald Trump proved critics wrong in 2015
Erin Burnett Out Front
Donald Trump defied the critics in 2015 using fiery rhetoric to come out of nowhere to lead the Republican presidential field. CNN's Tom Foreman reports.
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Donald Trump 16 videos
LAS VEGAS, NV - DECEMBER 14: Republican presidential candidate Donald Trump speaks during a campaign rally at the Westgate Las Vegas Resort & Casino on December 14, 2015 in Las Vegas, Nevada. Donlad Trump is campaigning in Las Vegas a day ahead of the final GOP debate. (Photo by Justin Sullivan/Getty Images)
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How Donald Trump proved critics wrong in 2015
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Green Party presidential nominee Jill Stein waits to be introduced prior to a press conference at the National Press Club August 23, 2016 in Washington, DC.
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Jill Stein raises millions for recount
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Former Democratic US Presidential candidate Hillary Clinton speaks to staff and supporters at the New Yorker hotel after her defeat in the presidential election November 9, 2016 in New York. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
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LYNDEN, WA - MAY 07: Republican presidential candidate Donald Trump gives a speech during a rally at the The Northwest Washington Fair and Event Center on May 7, 2016 in Lynden, Washington. Trump became the Republican presumptive nominee following his landslide win in Indiana on Tuesday. (Photo by Matt Mills McKnight/Getty Images)
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Members of the Secret Service rush Republican presidential candidate Donald Trump off the stage at a campaign rally in Reno, Nev., on Saturday, Nov. 5, 2016. (AP Photo/John Locher)
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Donald Trump rushed off stage by Secret Service
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US Republican presidential nominee Donald Trump speaks during rally at the Atkinson Country Club in Atkinson, New Hampshire on November 4, 2016.
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