Scenes from the first Republican presidential debate

Republican presidential candidate Donald Trump speaks as Jeb Bush listens during the first Republican presidential debate.

Republican presidential candidate Donald Trump responds to former Arkansas Gov. Mike Huckabee's closing remarks during the first Republican presidential debate.

Republican presidential candidate Jeb Bush fields a question during the first Republican presidential debate.

Republican presidential candidate Wisconsin Gov. Scott Walker appears on the large video screen hanging above the first prime-time presidential debate.

Audience members look up at the large video screen hanging above the first prime-time Republican presidential debate.

Republican presidential candidate Donald Trump appears on the large video screen hanging above the first prime-time presidential debate.

Audience members are reflected in a window as Republican presidential candidates participate in the first prime-time presidential debate.

Republican presidential candidate Ohio Gov. John Kasich says hello to the daughters of Sen. Ted Cruz, R-Texas Catherine, 4, sitting, and Caroline, 7 during a commercial break as they participate in the first Republican presidential debate.

Republican presidential candidates from left, Donald Trump, Jeb Bush, Mike Huckabee and Ted Cruz take the stage for the first Republican presidential debate.

Republican presidential candidate Mike Huckabee chats with Sen. Rand Paul (R-KY) during a break in the first Republican presidential debate.

Republican presidential candidates Donald Trump watches as Wisconsin Gov. Scott Walker gets his makeup retouched during a break in the first Republican presidential debate.

Republican presidential candidates take the stage for the first Republican presidential debate.

Republican presidential candidate and former Arkansas Gov. Mike Huckabee speaks during the first Republican presidential debate.

Donald Trump's daughter Ivanka, son Eric and wife Melania Knauss watch the first Republican presidential debate.

Republican presidential candidate Ohio Gov. John Kasich speaks during the first Republican presidential debate.

Republican presidential candidates from left, Marco Rubio, Jeb Bush and Ben Carson talk during a break during the first Republican presidential debate.

Republican presidential candidate New Jersey Gov. Chris Christie participates in the first prime-time presidential debate.

Republican presidential hopeful Ben Carson speaks during the prime time Republican presidential primary debate.

Audience members listen during the first Republican presidential debate.

Republican presidential candidate Sen. Rand Paul, R-Ky., speaks during the first Republican presidential debate.

Republican presidential candidates Wisconsin Gov. Scott Walker and Donald Trump participate in the first prime-time presidential debate.

Republican presidential candidates, from left, Jeb Bush, Mike Huckabee, Sen. Ted Cruz (R-TX), Sen. Rand Paul (R-KY) and John Kasich take the stage for the first prime-time presidential debate.

Wisconsin Gov. Scott Walker participates in the Republican presidential primary debate.

Republican presidential hopeful John Kasich speaks during the prime time Republican presidential primary debate.

Republican presidential hopeful Ted Cruz speaks during the prime time Republican presidential primary debate.

Republican presidential candidate New Jersey Gov. Chris Christie answers a question during the first Republican presidential debate.

Republican presidential candidates take the stage for the first Republican presidential debate.

Republican presidential candidates take the stage for the first prime-time presidential debate.

Republican presidential hopeful Donald Trump speaks during the prime time Republican presidential primary debate.

Republican presidential hopeful Ted Cruz speaks during the prime time Republican presidential primary debate.

Republican presidential candidate Jeb Bush speaks as Scott Walker and Donald Trump listen during the first Republican presidential debate.

News anchors Chris Wallace, left, Megan Kelly and Bret Baier, right, prepare to moderate the first prime-time Republican presidential debate hosted at the Quicken Loans Arena.

Republican presidential candidates Wisconsin Gov. Scott Walker, Donald Trump and Jeb Bush take the stage for the first prime-time presidential debate.

Republican presidential hopeful Donald Trump and Scott Walker arrive on stage for the start of the prime time Republican presidential primary debate.

Republican presidential candidates arrive on stage for the start of the first Republican presidential primary debate.

Republican presidential candidates from left, Jim Gilmore, Lindsey Graham, Bobby Jindal, Rick Perry, Rick Santorum, Carly Fiorina, and George Pataki take the stage for a pre-debate forum at the Quicken Loans Arena in Cleveland. Seven of the candidates have not qualified for the primetime debate.

Republican presidential hopeful Rick Perry has make-up applied while opponent Bobby Jendal watches before the presidential forum.

Rebulican presidential candidate Carly Fiorina fields a question during the presidential forum.

The finishing touches are made to the stage for the Republican presidential debate at Quicken Loans Arena on Aug. 6, 2015, in Cleveland.

People gather in front of a monitor at the Facebook lounge at the Quicken Loans Arena ahead of the debate.

The row of 10 podiums for the Republican presidential debate is set on stage at Quicken Loans Arena.

Ben Carson speaks to reporters after participating in a rapid-fire Q&A with Facebook at their lounge at Quicken Loans Arena before the debate.

Sen. Ted Cruz, R-Texas, speaks with a member of the media at Quicken Loans Arena before the debate.

Sen. Lindsey Graham, R-S.C., participates in a rapid-fire Q&A with Facebook at their lounge at Quicken Loans Arena before the debate.

Ohio Gov. John Kasich greets members of the media at Quicken Loans Arena.

Sen. Rand Paul, R-Ky., and his wife, Kelley, walk outside Quicken Loans Arena in Cleveland before the debate.