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., retired neurosurgeon Ben Carson participate during the CBS News Republican presidential debate at the Peace Center, Saturday, Feb. 13, 2016, in Greenville, S.C. (AP / John Bazemore)
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