Ben Carson, center, makes a point as Donald Trump, left, and Carly Fiorina look on during the CNBC Republican presidential debate at the University of Colorado, Wednesday, Oct. 28, 2015, in Boulder, Colo.
Ben Carson, center, makes a point as Donald Trump, left, and Carly Fiorina look on during the CNBC Republican presidential debate at the University of Colorado, Wednesday, Oct. 28, 2015, in Boulder, Colo. Mark J. Terrill AP
Ben Carson, center, makes a point as Donald Trump, left, and Carly Fiorina look on during the CNBC Republican presidential debate at the University of Colorado, Wednesday, Oct. 28, 2015, in Boulder, Colo. Mark J. Terrill AP