MILWAUKEE, WI - NOVEMBER 10: Presidential candidates Ohio Governor John Kasich (L-R) speaks while Jeb Bush, Sen. Marco Rubio (R-FL), Donald Trump, Ben Carson, Ted Cruz (R-TX), Carly Fiorina, and Sen. Rand Paul (R-KY) take part in the Republican Presidential Debate sponsored by Fox Business and the Wall Street Journal at the Milwaukee Theatre November 10, 2015 in Milwaukee, Wisconsin. The fourth Republican debate is held in two parts, one main debate for the top eight candidates, and another for four other candidates lower in the current polls. (Photo by Scott Olson/Getty Images)
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2016 Presidential Debates 59 videos
MILWAUKEE, WI - NOVEMBER 10: Presidential candidates Ohio Governor John Kasich (L-R) speaks while Jeb Bush, Sen. Marco Rubio (R-FL), Donald Trump, Ben Carson, Ted Cruz (R-TX), Carly Fiorina, and Sen. Rand Paul (R-KY) take part in the Republican Presidential Debate sponsored by Fox Business and the Wall Street Journal at the Milwaukee Theatre November 10, 2015 in Milwaukee, Wisconsin. The fourth Republican debate is held in two parts, one main debate for the top eight candidates, and another for four other candidates lower in the current polls. (Photo by Scott Olson/Getty Images)
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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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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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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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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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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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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  — 

Welcome to the CNN live blog, where we’ll be bringing you all the best moments from the debate – on the stage, on social media and behind the scenes.

Your host for the evening is CNN political reporter Tal Kopan, who will also be bringing you insights from the whole CNN political team, both in Milwaukee and Washington, D.C.