Nine candidates are facing off for the final Republican presidential primary debate of 2015, a critical event that will help shape the contest heading into the Iowa caucuses.
Donald Trump, the front-runner for the nomination, is again center stage. Surrounding him are Ben Carson, Ted Cruz, Marco Rubio, Jeb Bush, Carly Fiorina, Chris Christie, John Kasich and Rand Paul.
Follow live coverage of the debate below:
