Republican U.S. presidential candidates Pataki, Huckabee, Santorum, and Graham pose together before a...
Republican U.S. presidential candidates (L-R) former Governor George Pataki, former Governor Mike Huckabee, former Senator Rick Santorum, and Sen. Lindsey Graham pose together before a forum held for lower polling candidates ahead of the Republican presidential debate in Las Vegas, Nevada December 15, 2015. REUTERS/David Becker