GOP 2016 candidates composite
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Top moments from first GOP presidential debate
04:38 - Source: CNN
2016 Presidential Debates 59 videos
GOP 2016 candidates composite
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Top moments from first GOP presidential debate
04:38
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Tapper: 'Unbelievable' how quickly Trump took the bait
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CHARLESTON, SC - JANUARY 17: Democratic presidential candidates Martin OMalley (L), Hillary Clinton (C) and Senator Bernie Sanders (I-VT) participate in the Democratic Candidates Debate hosted by NBC News and YouTube on January 17, 2016 in Charleston, South Carolina. This is the final debate for the Democratic candidates before the Iowa caucuses. (Photo by Andrew Burton/Getty Images)
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NBC Democratic presidential debate in 90 seconds
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Clinton, Sanders disagree on support of President Obama
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CHARLESTON, SC - JANUARY 17: Democratic presidential candidates Martin OMalley (L), Hillary Clinton (C) and Senator Bernie Sanders (I-VT) participate in the Democratic Candidates Debate hosted by NBC News and YouTube on January 17, 2016 in Charleston, South Carolina. This is the final debate for the Democratic candidates before the Iowa caucuses. (Photo by Andrew Burton/Getty Images)
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Debate reality check: Who was telling the truth?
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Bernie Sanders defends gun control record
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Clinton to Sanders: I'm not starting over on healthcare
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Sanders: 'The Democratic Party needs major reform'
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Trump: Cruz 'insulted 20 million people'
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Republican presidential candidates, from left, Ohio Gov. John Kasich, New Jersey Gov. Chris Christie, Sen. Marco Rubio, R-Fla., businessman Donald Trump, Sen. Ted Cruz, R-Texas, retired neurosurgeon Ben Carson and former Florida Gov. Jeb Bush take the stage before the Fox Business Network Republican presidential debate at the North Charleston Coliseum, Thursday, Jan. 14, 2016, in North Charleston, S.C. (AP Photo/Rainier Ehrhardt)
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Fox Business GOP debate in 90 seconds
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WASHINGTON, DC - JANUARY 12: President Barack Obama delivers his State of the Union address before a joint session of Congress on Capitol Hill January 12, 2016 in Washington, D.C. In his final State of the Union, President Obama reflected on the past seven years in office and spoke on topics including climate change, gun control, immigration and income inequality. (Photo by Evan Vucci/Pool/Getty Images)
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GOP Candidates Take Swings at Obama's SOTU
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Rubio, Cruz clash over proposed VAT tax
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NORTH CHARLESTON, SC - JANUARY 14: Republican presidential candidates (L-R) Donald Trump and Sen. Ted Cruz (R-TX) participate in the Fox Business Network Republican presidential debate at the North Charleston Coliseum and Performing Arts Center on January 14, 2016 in North Charleston, South Carolina. The sixth Republican debate is held in two parts, one main debate for the top seven candidates, and another for three other candidates lower in the current polls. (Photo by Scott Olson/Getty Images)
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Trump to Cruz: You're a liability as a candidate
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Rubio to Cruz: We all saw you flip your vote
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Ted Cruz deflects NYT 'hit piece'
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Christie: State of the Union was story time with Obama
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Bush: Trump's ban makes it impossible to take out ISIS
01:23
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Cruz, Trump debate 'New York values'
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Sen. Rubio and Gov. Christie's heated exchange
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Trump answers Gov. Haley's 'angriest voices' remark
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Fiorina: We can't outsource leadership in Middle East
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Fiorina slams Trump, Clinton
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Huckabee: Obama keeps pushing ideas that never work
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Rick Santorm: Go Google me
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Rick Santorum to cadets: 'I will have your back'
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US Democratic presidential hopefuls (L-R) Bernie Sanders, Hillary Clinton and Martin O'Malley greet each other following the Democratic Presidential Debate hosted by ABC News at Saint Anselm College in Manchester, New Hampshire, on December 19, 2015.
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ABC Democratic debate in two minutes
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Clinton: Trump 'is becoming ISIS' best recruiter'
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Clinton, Sanders, O'Malley talk spouses' roles
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Bernie Sanders: Corporate America 'ain't gonna like me'
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Clinton: Trump rhetoric encourages radicalization
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Bernie Sanders addresses data breach controversy
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Republican presidential candidate Ohio Governor John Kasich (L) speaks during the Republican Presidential Debate, hosted by CNN, at The Venetian Las Vegas on December 15, 2015 in Las Vegas, Nevada.
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CNN Republican debate in 90 seconds
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Muslim voters react to GOP debate
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The gloomy America on display at the GOP debate
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Donald Trump: 'Oh, you're a tough guy Jeb'
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Bush to Trump: You can't insult your way to presidency
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Donald Trump responds to debate booing
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Reality Check: GOP candidates clash over terrorism
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Highlights from the Trump/Bush splitscreen
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Sen. Graham's best lines from the CNN undercard debate
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Donald Trump calls CNN debate 'unprofessional'
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President Underwood appears during GOP debate
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CNN's Reality Check: Ted Cruz vs the White House
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Gov. Jeb Bush: Trump's rhetoric is 'dog whistle talk'
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Donald Trump: There's no burden being a front-runner
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Donald Trump commits to the Republican Party
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Carson: 'Merciful' to 'finish the job' in War on Terror
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Rand Paul questions Donald Trump's candidacy
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Republican presidential candidates George Pataki, Mike Huckabee, Rick Santorum and Sen. Lindsay Graham are introduced during the CNN presidential debate at The Venetian Las Vegas on December 15, 2015.
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The undercard debate in one minute
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Marco Rubio attacks Ted Cruz's voting record
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Donald Trump defends ban on Muslim immigrants
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Jeb Bush attacks Donald Trump, Trump hits back
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Gov. Chris Christie addresses L.A. school shutdown
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Carson holds moment of silence for San Bernardino
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Paul: Trump says we should close 'that Internet thing'
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Sen. Lindsey Graham: 'I miss George W. Bush'
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Mike Huckabee: Monitor radical Islam on social media
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Rick Santorum: 'All jihadists are Muslims'
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Graham apologizes for Donald Trump's stance on Islam
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The first GOP debate is over, but what a night it was. Relive the best moments from the debates, social media and our whole CNN Politics team as it was brought to you in real time by political reporter Tal Kopan.