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LAS VEGAS, NV - DECEMBER 14:  Republican presidential candidate Donald Trump gestures as he 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)
LAS VEGAS, NV - DECEMBER 14:  Republican presidential candidate Donald Trump gestures as he 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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    Donald Trump skips stage preps on debate day

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Donald Trump skips stage preps on debate day

CNN's Sara Murray reports just steps away from the debate stage as candidate Ben Carson checks out his podium position.

Donald Trump skips stage preps on debate day

CNN's Sara Murray reports just steps away from the debate stage as candidate Ben Carson checks out his podium position.