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Presidential candidates Ohio Governor John Kasich (L-R), Mike Huckabee, Jeb Bush, Sen. Marco Rubio (R-FL), Donald Trump, Ben Carson take part in the CNBC Republican Presidential Debate at University of Colorados Coors Events Center October 28, 2015 in Boulder, Colorado.
Presidential candidates Ohio Governor John Kasich (L-R), Mike Huckabee, Jeb Bush, Sen. Marco Rubio (R-FL), Donald Trump, Ben Carson take part in the CNBC Republican Presidential Debate at University of Colorados Coors Events Center October 28, 2015 in Boulder, Colorado.

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Sparks fly between candidates in GOP debate

John Berman reports on the biggest moments from the CNBC Republican debate.

Sparks fly between candidates in GOP debate

John Berman reports on the biggest moments from the CNBC Republican debate.