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DES MOINES, IA - AUGUST 16:  Republican presidential hopeful Ben Carson speaks during the Iowa State Fair on August 16, 2015 in Des Moines, Iowa.  Presidential candidates are addressing attendees at the Iowa State Fair on the Des Moines Register Presidential Soapbox stage and touring the fairgrounds. The State Fair runs through August 23.  (Photo by Justin Sullivan/Getty Images)
DES MOINES, IA - AUGUST 16:  Republican presidential hopeful Ben Carson speaks during the Iowa State Fair on August 16, 2015 in Des Moines, Iowa.  Presidential candidates are addressing attendees at the Iowa State Fair on the Des Moines Register Presidential Soapbox stage and touring the fairgrounds. The State Fair runs through August 23.  (Photo by Justin Sullivan/Getty Images)

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    Ben Carson surging in polls as debate looms

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Ben Carson surging in polls as debate looms

Dean Parker, Finance Committee Chairman for the Ben Carson campaign, speaks with CNN's Brooke Baldwin about the candidate's recent rise in the polls.

Ben Carson surging in polls as debate looms

Dean Parker, Finance Committee Chairman for the Ben Carson campaign, speaks with CNN's Brooke Baldwin about the candidate's recent rise in the polls.