Poll: Clinton won last debate, 53 percent of Republicans would accept election results

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Hillary Clinton won the third and final debate of the 2016 Presidential Election cycle by a 9-point margin over Donald Trump, according to likely voters who watched or followed coverage of Wednesday's face-off. A 46 percent plurality said Clinton won the debate, while 37 percent said Trump won. Another 17 percent said that neither candidate won the debate. Clinton's final victory over the Republican nominee marks a decisive sweep of all three debates.

These results are according to the NBC News|SurveyMonkey Third Debate Reaction Poll conducted on Thursday, October 20.

The debate was most notable for Trump's refusal to say he would accept the outcome of the election—causing a backlash among GOP leaders including Sen. Lindsey Graham and Rep. Carlos Curbelo. Arizona Sen. John McCain said that while he didn't like the outcome of the 2008 election, he had a duty to concede, and did so without reluctance: "That's not just the Republican way or the Democratic way. It's the American way."

At a campaign rally in Florida on Thursday, President Obama called the remarks "dangerous," and urged Democrats to turn out in force for the Presidential Election.

See photos of the final presidential debate:

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Clinton and Trump face off in the final presidential debate
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Clinton and Trump face off in the final presidential debate
Democratic presidential nominee Hillary Clinton speaks during the third and final US presidential debate with Republican nominee Donald Trump at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Paul J. Richards (Photo credit should read PAUL J. RICHARDS/AFP/Getty Images)
Republican presidential nominee Donald Trump is seen on screens speaking during the final presidential debate with Democratic presidential nominee Hillary Clinton at the University of Nevada October 19, 2016 in Las Vegas, Nevada. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
Republican U.S. presidential nominee Donald Trump and Democratic nominee Hillary Clinton begin their third and final 2016 presidential campaign debate at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Mike Blake
Republican nominee Donald Trump speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)
Democratic presidential nominee Hillary Clinton debates with Republican presidential nominee Donald Trump during the third presidential debate at UNLV in Las Vegas, Wednesday, Oct. 19, 2016. (Mark Ralston/Pool via AP)
US Republican presidential candidate Donald Trump speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
Democratic nominee Hillary Clinton speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
Republican presidential nominee Donald Trump during the third presidential debate with Democratic presidential nominee Hillary Clinton at UNLV in Las Vegas, Wednesday, Oct. 19, 2016. (AP Photo/David Goldman)
Republican nominee Donald Trump speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
Democratic presidential nominee Hillary Clinton speaks during the third presidential debate with Republican presidential nominee Donald Trump at UNLV in Las Vegas, Wednesday, Oct. 19, 2016. (AP Photo/Patrick Semansky)
Republican presidential nominee Donald Trump and Democratic presidential nominee Hillary Clinton wait to begin their final debate at the University of Nevada October 19, 2016 in Las Vegas, Nevada. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
Meg Whitman (C), Hewlett-Packard president and chief executive officer, and retired basketball player Kareem Abdul-Jabbar (2nd R) attend the third and final presidential debate between Republican presidential nominee Donald Trump and Democratic contender Hillary Clinton at the University of Nevada in Las Vegas on October 19, 2016. / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
US Democratic presidential candidate Hillary Clinton speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
Republican presidential nominee Donald Trump points toward Democratic presidential nominee Hillary Clinton as he answers a question during the third presidential debate at UNLV in Las Vegas, Wednesday, Oct. 19, 2016. (AP Photo/John Locher)
Democratic nominee Hillary Clinton speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
Democratic presidential nominee Hillary Clinton exchanges views Republican presidential nominee Donald Trump during the third presidential debate at UNLV in Las Vegas, Wednesday, Oct. 19, 2016. (AP Photo/John Locher)
Democratic presidential nominee Hillary Clinton listens to Republican presidential nominee Donald Trump during the third presidential debate at UNLV in Las Vegas, Wednesday, Oct. 19, 2016. (AP Photo/Patrick Semansky)
US Republican presidential candidate Donald Trump speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
Democratic presidential nominee Hillary Clinton answers a question during the third presidential debate at UNLV in Las Vegas, Wednesday, Oct. 19, 2016. (AP Photo/John Locher)
Republican presidential nominee Donald Trump speaks during the third presidential debate with Democratic presidential nominee Hillary Clinton at UNLV in Las Vegas, Wednesday, Oct. 19, 2016. (AP Photo/David Goldman)
Republican presidential nominee Donald Trump listens to Democratic presidential nominee Hillary Clinton during the third presidential debate at UNLV in Las Vegas, Wednesday, Oct. 19, 2016. (AP Photo/David Goldman)
Democratic presidential nominee Hillary Clinton speaks during the third presidential debate with Republican presidential nominee Donald Trump at UNLV in Las Vegas, Wednesday, Oct. 19, 2016. (AP Photo/Patrick Semansky)
Republican U.S. presidential nominee Donald Trump speaks during the third and final debate with Democratic nominee Hillary Clinton (not pictured) at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Carlos Barria
Debate moderator Chris Wallace smiles back at the audiencee before Republican U.S. presidential nominee Donald Trump and Democratic nominee Hillary Clinton's third and final 2016 presidential campaign debate at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Carlos Barria
Republican U.S. presidential nominee Donald Trump and Democratic U.S. presidential nominee Hillary Clinton keep their distance and do not shake hands at the start of the their third and final 2016 presidential campaign debate at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Joe Raedle/Pool
Democratic nominee Hillary Clinton speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
Democratic nominee Hillary Clinton speaks as Republican nominee Donald Trump looks on during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)
US Republican presidential candidate Donald Trump (L) and US Democratic presidential candidate Hillary Clinton arrive for the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
Democratic nominee Hillary Clinton (R) and Republican nominee Donald Trump arrive for the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
US Republican presidential candidate Donald Trump speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
Democratic presidential nominee Hillary Clinton steps on stage to debate Republican presidential nominee Donald Trump during the third presidential debate at UNLV in Las Vegas, Wednesday, Oct. 19, 2016. (AP Photo/John Locher)
Republican U.S. presidential nominee Donald Trump listens as Democratic U.S. presidential nominee Hillary Clinton speaks during their third and final 2016 presidential campaign debate at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/David Becker
Republican U.S. presidential nominee Donald Trump adjusts his microphone while he listens as Democratic nominee Hillary Clinton speaks during their third and final 2016 presidential campaign debate at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Rick Wilking
Donald Trump Jr. sits between his wife Vanessa (L) and his brother Eric Trump (R) during the third and final debate between Republican U.S. presidential nominee Donald Trump and Democratic nominee Hillary Clinton at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Rick Wilking
Republican U.S. presidential nominee Donald Trump speaks during the third and final debate with Democratic nominee Hillary Clinton (not pictured) at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Carlos Barria
Democratic U.S. presidential nominee Hillary Clinton walks onstage for the third and final 2016 presidential campaign debate with Republican U.S. presidential nominee Donald Trump at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Lucy Nicholson
US Republican presidential candidate Donald Trump speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
Democratic nominee Hillary Clinton speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
Republican presidential nominee Donald Trump and Democratic presidential nominee Hillary Clinton arrive on stage for their final debate at the University of Nevada October 19, 2016 in Las Vegas, Nevada. / AFP / Brendan Smialowski (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
Republican presidential nominee Donald Trump arrives on stage for the third and final presidential debate at the University of Nevada in Las Vegas on October 19, 2016. / AFP / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
US Republican presidential candidate Donald Trump speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
Republican nominee Donald Trump speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
US Republican presidential candidate Donald Trump speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
US Republican presidential candidate Donald Trump speaks during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
Republican U.S. presidential nominee Donald Trump and Democratic U.S. presidential nominee Hillary Clinton keep their distance and do not shake hands at the start of the their third and final 2016 presidential campaign debate at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Joe Raedle/Pool
Chelsea Clinton, her father former U.S. president Bill Clinton, and her husband Marc Mezvinsky arrive before Republican U.S. presidential nominee Donald Trump and Democratic nominee Hillary Clinton's third and final 2016 presidential campaign debate at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Carlos Barria
Melania Trump arrives for the third and final debate between Republican U.S. presidential nominee Donald Trump and Democratic nominee Hillary Clinton at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Carlos Barria
Ivanka Trump takes her seat before the third and final 2016 presidential campaign debate between Republican U.S. presidential nominee Donald Trump and Democratic nominee Hillary Clinton at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Mike Blake
Melania Trump (R) greets vice presidential candidate Mike Pence before the third and final 2016 presidential campaign debate between Republican U.S. presidential nominee Donald Trump and Democratic nominee Hillary Clinton at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Mike Blake
Debate moderator Chris Wallace speaks prior to the third and final US presidential debate between Democratic nominee Hillary Clinton and Republican nominee Donald Trump at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Mark RALSTON (Photo credit should read MARK RALSTON/AFP/Getty Images)
Eric Trump takes his seat before the third and final 2016 presidential campaign debate between Republican U.S. presidential nominee Donald Trump and Democratic nominee Hillary Clinton at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Mike Blake
Fox News modeator Chris Wallace speaks before the third and final 2016 presidential campaign debate between Republican U.S. presidential nominee Donald Trump and Democratic nominee Hillary Clinton at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Mike Blake
Actor Ted Danson and his wife actress Mary Steenburgen sit before Republican U.S. presidential nominee Donald Trump and Democratic U.S. presidential nominee Hillary Clinton's third and final 2016 presidential campaign debate at UNLV in Las Vegas, Nevada, U.S., October 19, 2016. REUTERS/Mark Ralston/Pool
Democratic nominee Hillary Clinton arrives for the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
Republican nominee Donald Trump gestures as Democratic nominee Hillary Clinton looks on during the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
Democratic nominee Hillary Clinton (R) and Republican nominee Donald Trump walk off the stage after the final presidential debate at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
People watch the third presidential debate between presidential debate between US Democratic presidential candidate Hillary Clinton and US Republican presidential candidate Donald Trump at the Trump International Hotel October 19, 2016 in Washington, D.C. / AFP / ZACH GIBSON (Photo credit should read ZACH GIBSON/AFP/Getty Images)
People watch the third presidential debate between US Democratic presidential candidate Hillary Clinton and US Republican presidential candidate Donald Trump is pictured at The Hawk 'n' Dove bar October 19, 2016 in Washington, D.C. / AFP / ZACH GIBSON (Photo credit should read ZACH GIBSON/AFP/Getty Images)
Democratic presidential nominee Hillary Clinton waves from the stage following the third and final US presidential debate with Republican nominee Donald Trump (background) at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Paul J. Richards (Photo credit should read PAUL J. RICHARDS/AFP/Getty Images)
LAS VEGAS, NV - OCTOBER 19: Democratic presidential nominee former Secretary of State Hillary Clinton walks off stage as Republican presidential nominee Donald Trump looks on during the third U.S. presidential debate at the Thomas & Mack Center on October 19, 2016 in Las Vegas, Nevada. Tonight is the final debate ahead of Election Day on November 8. (Photo by Drew Angerer/Getty Images)
Democratic presidential nominee Hillary Clinton departs the stage following the third and final US presidential debate with Republican nominee Donald Trump at the Thomas & Mack Center on the campus of the University of Las Vegas in Las Vegas, Nevada on October 19, 2016. / AFP / Paul J. Richards (Photo credit should read PAUL J. RICHARDS/AFP/Getty Images)
LAS VEGAS, NV - OCTOBER 19: Democratic presidential nominee former Secretary of State Hillary Clinton (R) debates with Republican presidential nominee Donald Trump during the third U.S. presidential debate at the Thomas & Mack Center on October 19, 2016 in Las Vegas, Nevada. Tonight is the final debate ahead of Election Day on November 8. (Photo by Joe Raedle/Getty Images)
LAS VEGAS, NV - OCTOBER 19: Republican presidential nominee Donald Trump gestures as he speaks during the third U.S. presidential debate at the Thomas & Mack Center on October 19, 2016 in Las Vegas, Nevada. Tonight is the final debate ahead of Election Day on November 8. (Photo by Win McNamee/Getty Images)
LAS VEGAS, NV - OCTOBER 19: Democratic presidential nominee former Secretary of State Hillary Clinton gestures to the crowd as she walks off stage as Republican presidential nominee Donald Trump smiles after the third U.S. presidential debate at the Thomas & Mack Center on October 19, 2016 in Las Vegas, Nevada. Tonight is the final debate ahead of Election Day on November 8. (Photo by Chip Somodevilla/Getty Images)
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Among likely voters, however, 31 percent said they might not accept the results as legitimate if their preferred candidate did not win. Eighteen percent said it's unlikely they would accept the election as legitimate if their candidate loses and 13 percent said they would definitely not accept it.

This sentiment was stronger among Republicans, suggesting that Trump's message is getting through to a sizable number of his party's constituents. Among Republican and Republican-leaning likely voters, 45 percent said they might not accept the election as legitimate if their candidate doesn't win, including 18 percent who said they would definitely not accept the outcome. A majority of Republicans—53 percent—said they would accept the results of the election if their candidate loses.

An overwhelming majority of Democrats and Democratic-leaning voters—82 percent—said they would definitely or probably accept the election.

Partisanship is still very important in this election, and it played a role in how voters assessed Clinton's and Trump's performance in the final debate. Among Democrats and Democratic-leaning likely voters, 88 percent said that Clinton won the debate. An overwhelming majority of Republicans stood behind their candidate—72 percent of Republican and Republican-leaning likely voters said Trump won the debate. Independents were more divided. Thirty-nine percent of likely Independent voters said neither candidate won the debate.

As we head into the final weeks of the campaign, the impact of Trump's refusal to say whether or not he will accept the results of the election will be watched closely.

The NBC News|SurveyMonkey Third Debate Reaction Poll was conducted online October 20 among a national sample of 6,538 adults who are likely to vote. Respondents for this non-probability survey were selected from the nearly three million people who take surveys on the SurveyMonkey platform each day. Results have an error estimate of plus or minus 1.9 percentage points. For full results and methodology, click here.

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