BOULDER, CO - OCTOBER 28: Presidential candidate Donald Trump gives a thumbs up during the CNBC Republican Presidential Debate at University of Colorados Coors Events Center October 28, 2015 in Boulder, Colorado. ...

BOULDER, CO - OCTOBER 28: Presidential candidate Donald Trump gives a thumbs up during the CNBC Republican Presidential Debate at University of Colorados Coors Events Center October 28, 2015 in Boulder, Colorado. Fourteen Republican presidential candidates are participating in the third set of Republican presidential debates. (Photo by Justin Sullivan/Getty Images)

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