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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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Republican presidential candidate Ben Carson talks to CNN's New Day as his retooled campaign makes a final push ahead of the Iowa caucus.

Ben Carson: I'll have 'more pep in my step'

Republican presidential candidate Ben Carson talks to CNN's New Day as his retooled campaign makes a final push ahead of the Iowa caucus.