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Audience members are reflected in a window as Republican presidential candidates (L-R) New Jersey Gov. Chris Christie, Sen. Marco Rubio (R-FL), Ben Carson, Wisconsin Gov. Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Sen. Ted Cruz (R-TX), Sen. Rand Paul (R-KY) and John Kasich participate in the first prime-time presidential debate hosted by FOX News and Facebook at the Quicken Loans Arena August 6, 2015 in Cleveland, Ohio.
Audience members are reflected in a window as Republican presidential candidates (L-R) New Jersey Gov. Chris Christie, Sen. Marco Rubio (R-FL), Ben Carson, Wisconsin Gov. Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Sen. Ted Cruz (R-TX), Sen. Rand Paul (R-KY) and John Kasich participate in the first prime-time presidential debate hosted by FOX News and Facebook at the Quicken Loans Arena August 6, 2015 in Cleveland, Ohio.

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    GOP debate rules amended

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GOP debate rules amended

CNN's Brianna Keilar speaks to CNN Politics Executive Editor Mark Preston about the updated rules for the Republican debate.

GOP debate rules amended

CNN's Brianna Keilar speaks to CNN Politics Executive Editor Mark Preston about the updated rules for the Republican debate.