Republican Presidential hopeful Donald Trump (3R) speaks Mike Huckabee (L), Jeb Bush (2L), Marco Rubio (C), Ben Carson (2R) and Carly Fiorina look on during the CNBC Republican Presidential Debate, October 28, 2015 at the Coors Event Center at the University of Colorado in Boulder, Colorado. AFP PHOTO/ ROBYN BECK        (Photo credit should read ROBYN BECK/AFP/Getty Images)