John Bazemore / AP
Republican presidential candidates, from left, Ohio Gov. John Kasich; former Florida Gov. Jeb Bush; Sen. Ted Cruz, R-Texas; businessman Donald Trump; Sen. Marco Rubio, R-Fla.; and retired neurosurgeon Ben Carson take the stage Saturday, Feb. 13, 2016, before the CBS News Republican presidential debate at the Peace Center in Greenville, S.C.