Poll: Biden leads 2020 Democrats, Warren surges to third behind Sanders

Former Vice President Joe BidenJoe BidenDes Moines Register endorses Elizabeth Warren as Democratic presidential nominee Sanders faces lingering questions about appeal to women voters George Conway: Witness missing from impeachment trial is Trump MORE leads the pack of Democratic presidential candidates, but Sen. Elizabeth WarrenElizabeth Ann WarrenDes Moines Register endorses Elizabeth Warren as Democratic presidential nominee Sanders faces lingering questions about appeal to women voters Sunday shows preview: Lawmakers prepare for week two of impeachment trial MORE (D-Mass.) is on the rise, according to a Harvard CAPS/Harris poll released exclusively to The Hill.

The survey shows Biden in first place with 32 percent support among Democrats, followed by Sen. Bernie SandersBernie SandersKaine: Obama called Trump a 'fascist' during 2016 campaign Des Moines Register endorses Elizabeth Warren as Democratic presidential nominee Sanders faces lingering questions about appeal to women voters MORE (I-Vt.) at 16 percent, both falling slightly from the previous poll.

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But Warren isn’t far behind. The new poll pegs her support at 13 percent — a 5-point jump since the last Harvard CAPS/Harris poll was conducted in the wake of the July Democratic presidential debates in Detroit. 

That places her third, replacing Sen. Kamala HarrisKamala Devi HarrisHarris on 2020 endorsement: 'I am not thinking about it right now' Panel: Is Kamala Harris a hypocrite for mulling a Joe Biden endorsement? The Hill's Morning Report — Dems detail case to remove Trump for abuse of power MORE (D-Calif.) who came in fourth place with 7 percent support in the latest poll. South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegDes Moines Register endorses Elizabeth Warren as Democratic presidential nominee Candidates weighing using private jets to get to Iowa Biden nabs endorsement from Iowa Democrat in swing district MORE and former Rep. Beto O’Rourke (D-Texas) tied for fifth place with 4 percent support.

Only two other candidates notched above 1 percent in the survey: Sen. Cory BookerCory Anthony BookerSenate Dems to Pompeo: Comments about NPR reporter 'insulting and contemptuous' Black caucus in Nevada: 'Notion that Biden has all of black vote is not true' The Hill's 12:30 Report: House managers to begin opening arguments on day two MORE (D-N.J.), with 3 percent, and former tech executive Andrew YangAndrew YangSunday shows preview: Lawmakers prepare for week two of impeachment trial John Leguizamo joins the 'Yang Gang' CNN to host two straight nights of Democratic town halls before NH primary MORE, with 2 percent.

While Biden still holds a comfortable lead over his closest competitors, his support is down 2 points from the last Harvard CAPS/Harris poll. No candidate gained more in the latest survey than Warren, who has been steadily climbing in public polls for months.

“Biden continues in our poll to have a steady lead above his rivals but that lead in the low 30s is no guarantee of the nomination,” Mark PennMark PennEnd impeachment's government shutdown Poll: Majority say IG report revealed pattern of misjudgment by FBI Poll: Biden holds double-digit lead over 2020 Democratic rivals MORE, the co-director of the Harvard CAPS/Harris poll, said. 

“He has to show some movement soon as others are gaining in excitement and momentum. There may be scores of candidates in the race but only a few of them are getting to double digits.”

Still, Biden remains the candidate that voters see as having the best chance of defeating President TrumpDonald John TrumpKaine: Obama called Trump a 'fascist' during 2016 campaign Kaine: GOP senators should 'at least' treat Trump trial with seriousness of traffic court Louise Linton, wife of Mnuchin, deletes Instagram post in support of Greta Thunberg MORE in 2020. Thirty-six percent of respondents pointed to the vice president as the most formidable challenger to the president, while 13 percent chose Sanders and 8 percent picked Warren. 

The Harvard CAPS/Harris poll surveyed 985 registered Democratic voters from Aug. 26-28. The poll is a collaboration of the Center for American Political Studies at Harvard University and The Harris Poll. The Hill will be working with Harvard CAPS/Harris Poll throughout 2019.

Full poll results will be posted online later this week. The Harvard CAPS/Harris Poll survey is an online sample drawn from the Harris Panel and weighted to reflect known demographics. As a representative online sample, it does not report a probability confidence interval.