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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)
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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    Trump's 2015 strategy: break all the rules

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Trump's 2015 strategy: break all the rules

Republican Donald Trump spent 2015 running a non-traditional campaign and it has worked with GOP voters. But does he have the ground game to win the votes?

Trump's 2015 strategy: break all the rules

Republican Donald Trump spent 2015 running a non-traditional campaign and it has worked with GOP voters. But does he have the ground game to win the votes?