Photos: GOP 2016 presidential debate
Amid the back-and-forth bickering over Donald Trump, the Republican presidential contest took a substantive and serious turn in Wednesday's prime-time debate, with candidates wrangling over immigration, gay marriage and foreign affairs.
Chris Christie, Marco Rubio, Ben Carson, Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz, Rand Paul, John Kasich
Republican presidential candidates from left, Chris Christie, Marco Rubio, Ben Carson, Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz, Rand Paul, and John Kasich participate in the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
GOP 2016 Debate
Republican presidential candidate Ted Cruz speaks as Mike Huckabee, left, and Rand Paul listen during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Melania Trump, Caroline Cruz, Catherine Cruz, Ivanka Trump, Eric Trump
The daughters of Republican presidential candidate Sen. Ted Cruz, R-Texas, Catherine, 4, right, and Caroline, 7, center, visit with Donald Trump's wife Melania Trump, third from right, accompanied by Donald Trump's children Ivanka Trump, left, and Eric Trump, second from left, during a commercial break in the first Republican presidential debate at the Quicken Loans Arena, Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Ben Carson
Republican presidential candidate Ben Carson speaks to reporters after participating in a rapid fire Q&A with Facebook at their lounge at Quicken Loans Arena in Cleveland, Thursday, Aug. 6, 2015, before tonight's first Republican presidential debate. (AP Photo/Andrew Harnik)
Donald Trump
Republican presidential candidate Donald Trump gestures during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/John Minchillo)
Ted Cruz
Republican presidential candidate Sen. Ted Cruz, R-Texas, hugs his girls Catherine, 4, left, and Caroline, 7, during a commercial break as he participates in the first Republican presidential debate at the Quicken Loans Arena, Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Chris Christie, Marco Rubio, Ben Carson, Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz, Rand Paul, John Kasich
Republican presidential candidates from left, Chris Christie, Marco Rubio, Ben Carson, Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz, Rand Paul, and John Kasich take the stage for the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Chris Christie, Marco Rubio, Ben Carson, Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz, Rand Paul, John Kasich
Republican presidential candidates from left, Chris Christie, Marco Rubio, Ben Carson, Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz, Rand Paul, and John Kasich take the stage for the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. Republicans are steeling themselves for a long period of deep uncertainty following a raucous first debate of the 2016 campaign for president, with no signs this past week’s Fox News face-off will winnow their wide-open field of White House hopefuls anytime soon. (AP Photo/John Minchillo)
Chris Christie, Marco Rubio, Ben Carson, Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz, Rand Paul, John Kasich
Republican presidential candidates from left, Chris Christie, Marco Rubio, Ben Carson, Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz, Rand Paul, and John Kasich take the stage for the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Nikki Haley, Ivanka Trump
Ivanka Trump, daughter of Republican presidential candidate Donald Trump, center right, greets South Carolina Gov. Nikki Haley, center left, during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/John Minchillo)
GOP 2016 State of Play
Republican presidential candidates from left, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz and Rand Paul take the stage for the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. Republicans are steeling themselves for a long period of deep uncertainty following a raucous first debate of the 2016 campaign for president, with no signs this past week’s Fox News face-off will winnow their wide-open field of White House hopefuls anytime soon. (AP Photo/Andrew Harnik)
Ted Cruz, John Kasich
Republican presidential candidate Ohio Gov. John Kasich, center, says hello to the daughters of Sen. Ted Cruz, R-Texas, right, Catherine, 4, second from right, and Caroline, 7, left, during a commercial break as they participate in the first Republican presidential debate at the Quicken Loans Arena, Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Donald Trump
Republican presidential candidate Donald Trump responds to former Arkansas Gov. Mike Huckabee's closing remarks during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland, as Jeb Bush laughs. (AP Photo/Andrew Harnik)
Ben Carson
Republican presidential candidate Ben Carson smiles during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Mike Huckabee, Ted Cruz
Republican presidential candidate Mike Huckabee speaks as Ted Cruz listens during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Rick Perry
Republican presidential candidate former Texas Gov. Rick Perry has his make-up touched up during a commercial break as he participates in a pre-debate forum at the Quicken Loans Arena, Thursday, Aug. 6, 2015, in Cleveland. Seven of the candidates have not qualified for the primetime debate. (AP Photo/Andrew Harnik)
Rand Paul
Republican presidential candidate Sen. Rand Paul, R-Ky., speaks during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/John Minchillo)
Donald Trump
Republican presidential candidate Donald Trump gestures during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/John Minchillo)
Chris Christie, Marco Rubio, Ben Carson, Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz, Rand Paul, John Kasich
Republican presidential candidates from left, Chris Christie, Marco Rubio, Ben Carson, Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz, Rand Paul, and John Kasich take the stage for the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Ted Cruz
Republican presidential candidate and Sen. Ted Cruz, R-Texas, speaks during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/John Minchillo)
GOP 2016 Debate
Republican presidential candidates from left, Donald Trump, Jeb Bush, Mike Huckabee and Ted Cruz take the stage for the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Mike Huckabee
Republican presidential candidate and former Arkansas Gov. Mike Huckabee speaks during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/John Minchillo)
GOP 2016 Debate
Republican presidential candidate former Florida Gov, Jeb Bush speaks during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
GOP 2016 Debate Viewers Guide
FILE - In this Aug. 6, 2015, file photo Republican presidential candidate Donald Trump speaks as Jeb Bush watches during a Republican presidential debate in Cleveland. Eleven top-tier Republican presidential hopefuls face off in their second prime-time debate of the 2016 campaign Sept. 16, in a clash between outsiders and establishment candidates under a cathedral of political conservatism. (AP Photo/Andrew Harnik, File)
Donald Trump
Republican presidential candidate Donald Trump answers a question during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Ted Cruz
Republican presidential candidate Ted Cruz is seen on a screen during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Marco Rubio
Republican presidential candidate Sen. Marco Rubio, R-Fla., speaks during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/John Minchillo)
John Kasich
Republican presidential candidate Ohio Gov. John Kasich speaks to members of the media in the spin room following the first Republican presidential debate at the Quicken Loans Arena, Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Ben Carson
Republican presidential candidate Ben Carson speaks during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/John Minchillo)
Scott Walker
Republican presidential candidate and Wisconsin Gov. Scott Walker speaks during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/John Minchillo)
Jim Gilmore Lindsey Graham, Bobby Jindal, Rick Perry, Rick Santorum, Carly Fiorina, George Pataki
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, Thursday, Aug. 6, 2015, in Cleveland. Seven of the candidates have not qualified for the primetime debate. (AP Photo/Andrew Harnik)
APTOPIX GOP 2016 Debate
Republican presidential candidates from left, Marco Rubio, Jeb Bush and Ben Carson talk during a break during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Donald Trump
Republican presidential candidate Donald Trump speaks to the media in the spin room after the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/John Minchillo)
Chris Christie, Marco Rubio, Ben Carson, Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz, Rand Paul, John Kasich
Republican presidential candidates from left, Chris Christie, Marco Rubio, Ben Carson, Scott Walker, Donald Trump, Jeb Bush, Mike Huckabee, Ted Cruz, Rand Paul, and John Kasich take the stage for the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Chris Christie, Marco Rubio
Republican presidential candidate New Jersey Gov. Chris Christie speaks as Sen. Marco Rubio, R-Fla., listens during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Donald Trump
Republican presidential candidate Donald Trump responds to former Arkansas Gov. Mike Huckabee's closing remarks during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Chris Christie
Republican presidential candidate New Jersey Gov. Chris Christie during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/John Minchillo)
Chris Christie
Republican presidential candidate New Jersey Gov. Chris Christie answers a question during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
GOP 2016 Debate
People listen during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
John Kasich
Republican presidential candidate Ohio Gov. John Kasich speaks during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/Andrew Harnik)
Donald Trump (copy)
Republican presidential candidate Donald Trump gestures during the first Republican presidential debate at the Quicken Loans Arena Thursday, Aug. 6, 2015, in Cleveland. (AP Photo/John Minchillo)
Scott Walker headed to the second Republican presidential debate Wednesday, fresh from proposing a national take-down of labor unions.
Scott Walker mixed it up with Donald Trump early in the second debate over Wisconsin's structural deficit.