Biggest winners and losers of Democratic debate

FiveThirtyEight elections analyst Nathaniel Rackich reveals that Warren, Buttigieg and O'Rourke had the best performances of the night, but Julián Castro performed the worst.
3:56 | 09/13/19

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Transcript for Biggest winners and losers of Democratic debate
It was a major moment. In this campaign just ten candidates on that stage last night. The contrasts now move about among the candidates and the issues of health care gun control immigration. Trade know are now in Starker or. Increase your. Relief from before the debate. But now where we go from here who were the winners or losers last night how do voters fewer feel about the performance of the candidates. It is the field effectively now down to ten. For more on this or want to bring in. I Nathaniel rickets from 538 to and our friends over they are Nathaniel we talked to yesterday great to see you. You guys have done it's an instant polling on this before and after of sorts. To give us your bottom line who won last night. Yes we conducted a poll with excess of the same people both before and after the debate and those respondents send to basically Elizabeth Warren and the estimate performance they gave her the highest marks and also she was the only one of these four major candidates through more people said they were considering voting for people like I didn't Sanders and Harris all got fewer people saying considering running. And if there was a loser. Ha ha last night Nathaniel it does seem at least from the people you guys surveyed that. And Castro was the one who had sort of the weakest performance last night. Yeah exactly and I. And castor had the most controversial one of the most controversial moments the debate when he seems to of the two RS president Biden's age. And he earned and our response to our poll did indeed give him the worst ranking any of the ten candidates for the quality of the debate each and also his net favorability rating which is the share people who likes him minus the share people who dislike him fell by seven points which is not very good one that's just among members appear on our. He had a justice amount per second to studying the numbers closely again you just put up your results on 538 are comic it also strike me Nathaniel that. Basically the whole field of ten did pretty well we're we're talking about is some nuances in the numbers here when ranking knees but. Many many if not most of the candidates had solid performances last night according to our viewers that participated. Yeah exactly and I think you side because it was a very substantive debate debate and you saw some B Myanmar more minor candidates do Krewell so for example or an excuse me an example on people like she drew judge and battle work compost pad people on you know offer a significant number of people more people start consider them. There favorability rating increase and fact a work in particular among the subset of our respondents who actually watched the debate lives on his favorability ratings I've really went up so I think he had strong mama's on for example on gun control and also. Andres. Last thing I wanted that to ask you about Nathaniel because you did zero in on this question of electability which so many voters. Tuning in last night are sort of plugged into who has the best chance. A beating Donald Trump and I was struck by again in this instant poll from 538 in its us. It looked like the perception of Joseph Biden is the most electable candidate slipped a little bit Elizabeth Warren sort of gaining on him on that front. Yeah I think he has slipped as their rights is the right word here is I think for the most part we didn't see huge change in those electability perception maybe there's secret and of leveled out a little bit so you didn't see eat corn crop most electable candidate previously known date he became seems seems a little bit less electable some of the more minor candidates like. I Klobuchar or even Andrew Yang were seen as more electable I'm so it may be known by in the minds advantage in that arena is stating calm you know and Warren in particular I think if she's seen begins to be seen as more electable back and make her really dangerous standard policy. Art Smart analysis up right now at 538 dot com the king a rake it stinks so much have a great weekend at Daniel.

This transcript has been automatically generated and may not be 100% accurate.

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