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WILTON, IA - NOVEMBER 22:  Republican presidential candidate Ben Carson speaks to guests at a barbeque hosted by Jeff Kauffman, chairman of the Republican party of Iowa, on November 22, 2015 in Wilton, Iowa. The event, which was also attended by rival candidate Carly Fiorina, was one of three scheduled campaign stops for Carson in Iowa today.  (Photo by Scott Olson/Getty Images)
WILTON, IA - NOVEMBER 22:  Republican presidential candidate Ben Carson speaks to guests at a barbeque hosted by Jeff Kauffman, chairman of the Republican party of Iowa, on November 22, 2015 in Wilton, Iowa. The event, which was also attended by rival candidate Carly Fiorina, was one of three scheduled campaign stops for Carson in Iowa today.  (Photo by Scott Olson/Getty Images)

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Carson campaign chair: Rethink role of women in combat

Republican presidential candidate Ben Carson and his new campaign retired Army Major General Robert Dees discuss the option of rolling back recent military policy changes with CNN's Jake Tapper.

Carson campaign chair: Rethink role of women in combat

Republican presidential candidate Ben Carson and his new campaign retired Army Major General Robert Dees discuss the option of rolling back recent military policy changes with CNN's Jake Tapper.