Simi Valley, UNITED STATES
Republican U.S. presidential candidates pose before the start of the second official Republican presidential...
Republican U.S. presidential candidates (L-R), U.S. Senator Lindsey Graham, former New York Governor George Pataki, former U.S. Senator Rick Santorum, U.S. Senator Rand Paul, former Arkansas Governor Mike Huckabee, U.S. Senator Marco Rubio, U.S. Senator Ted Cruz, Dr. Ben Carson, businessman Donald Trump, former Florida Governor Jeb Bush, Wisconsin Governor Scott Walker, former CEO Carly Fiorina, Ohio Governor John Kasich and New Jersey Governor Chris Christie pose at the start of the second official Republican presidential candidates debate of the 2016 U.S. presidential campaign at the Ronald Reagan Presidential Library in Simi Valley, California, United States, September 16, 2015. REUTERS/Lucy Nicholson