Republican presidential candidates (L-R) Ohio Governor John Kasich, New Jersey Governor Chris Christie, Sen. Marco Rubio (R-FL), Donald Trump, Sen. Ted Cruz (R-TX), Ben Carson and Jeb Bush participate in the Fox Business Network Republican presidential debate at the North Charleston Coliseum and Performing Arts Center on January 14, 2016 in North Charleston, South Carolina. The sixth Republican debate is held in two parts, one main debate for the top seven candidates, and another for three other candidates lower in the current polls. (Photo by Scott Olson/Getty Images)