Republican presidential candidates (L-R) Ohio Governor John Kasich, Jeb Bush, Sen. Ted Cruz (R-TX), Donald Trump, Sen. Marco Rubio (R-FL) and Ben Carson participate in a CBS News GOP Debate February 13, 2016 at the Peace Center in Greenville, South Carolina. Residents of South Carolina will vote for the Republican candidate at the primary on February 20. (Photo by Spencer Platt/Getty Images)