The fourth GOP debate will air on Fox Business Network at 9:00 pm EST. The field will be smaller for this debate as New Jersey Gov. Chris Christie and former Arkansas governor Mike Huckabee were bumped from the main stage after they failed to reach a threshold of 2.5 percent in national polls.
The prime-time lineup: businessman Donald Trump, retired neurosurgeon Ben Carson, former Florida Gov. Jeb Bush, Florida Sen. Marco Rubio, Texas Sen. Ted Cruz, former technology executive Carly Fiorina, Kentucky Sen. Rand Paul and Ohio Gov. John Kasich.