Jeb Bush, second from left, is flanked by fellow candidates Mike Huckabee, Marco Rubio, Donald Trump and Ben Carson during the CNBC Republican presidential debate at the University of Colorado.
Jeb Bush, second from left, is flanked by fellow candidates Mike Huckabee, Marco Rubio, Donald Trump and Ben Carson during the CNBC Republican presidential debate at the University of Colorado. Mark J. Terrill AP
Jeb Bush, second from left, is flanked by fellow candidates Mike Huckabee, Marco Rubio, Donald Trump and Ben Carson during the CNBC Republican presidential debate at the University of Colorado. Mark J. Terrill AP