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Biden holds double-digit lead in Democratic primary

Biden holds double-digit lead in Democratic primary
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Former Vice President Joe BidenJoe BidenBiden: Trump 'continues to lie to us' about coronavirus Rally crowd chants 'lock him up' as Trump calls Biden family 'a criminal enterprise' Undecided voters in Arizona wary of Trump, crave stability MORE holds a double-digit lead against his closest rivals for the Democratic presidential nomination.

But there are signs Biden's support may be slipping, according to a new Harvard CAPS/Harris Poll survey released exclusively to The Hill.

The poll showed Biden with 28 percent support among registered Democratic voters, a 4-point drop since last month when a similar survey showed him at 32 percent. He’s trailed by Sens. Elizabeth WarrenElizabeth WarrenPush to expand Supreme Court faces Democratic buzzsaw Georgia senator mocks Harris's name before Trump rally: 'Kamala-mala-mala, I don't know' Warren, Porter to headline progressive fundraiser supporting seven swing state candidates MORE (D-Mass.) and Bernie SandersBernie SandersPush to expand Supreme Court faces Democratic buzzsaw Senate Democrats seek to alleviate public concern about some results not being available on election night Georgia senator mocks Harris's name before Trump rally: 'Kamala-mala-mala, I don't know' MORE (I-Vt.), who registered 17 percent and 16 percent, respectively.

No other candidate registered double digits. Sen. Kamala HarrisKamala HarrisUndecided voters in Arizona wary of Trump, crave stability Foreign policy is on the ballot in 2020; so is American credibility Perez on Biden's poll leads: Democrats 'take nothing for granted' MORE (D-Calif.), the fourth-place finisher in the poll, notched 6 percent, while three other candidates, South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegButtigieg says it's time to 'turn the page' on Trump administration Sunday shows preview: Coronavirus cases surge in the Midwest; Trump hits campaign trail after COVID-19 Biden town hall questioner worked as speechwriter in Obama administration: report MORE, former Rep. Beto O’Rourke (D-Texas) and entrepreneur Andrew YangAndrew YangPelosi spars with CNN's Blitzer over COVID-19 aid: 'You really don't know what you're talking about' The shape of guaranteed income Biden's latest small business outreach is just ... awful MORE, tied for fifth place with 3 percent each.

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Only three others, former Housing and Urban Development Secretary Julián Castro, Sen. Cory BookerCory Anthony BookerBooker 'outs' Cruz as vegan; Cruz jokingly decries 'scurrilous attack' Why Latinos should oppose Barrett confirmation Judiciary Committee sets vote on Barrett's nomination for next week MORE (D-N.J.) and billionaire philanthropist Tom SteyerTom Steyer2020 election already most expensive ever TV ads favored Biden 2-1 in past month Inslee calls Biden climate plan 'perfect for the moment' MORE, registered above 1 percent in the poll, taking 2 percent support each.

The Harvard CAPS/Harris Poll surveyed 693 registered Democratic voters from Sept. 22-24, and does not report a margin of error.

While Biden still leads in the poll, there were positive signs for Warren, who gained 4 points since a Harvard CAPS/Harris Poll survey conducted last month. The Massachusetts senator saw her support among black voters, a key Democratic voting bloc, more than double, ticking up from 6 percent in August to 13 percent at the end of September.

She also saw a 6-point gain among white voters, jumping from 15 percent in August to 21 percent in September, the poll shows. Biden, meanwhile, lost 10 points among white voters, falling from 35 percent last month to 25 percent now.

“We confirm that Biden is holding on, but Warren is surging as she develops a national following within the primary electorate,” Mark PennMark PennSwing-state polls suggest a narrowed path for Trump's reelection Exclusive poll: Biden up in Mich., Pa., tied with Trump in Fla. Biden holds 5-point lead over Trump in Pennsylvania: poll MORE, the co-director of the Harvard CAPS/Harris Poll, said. “The Sanders campaign could be in real trouble if they do not stem the tide soon.”

The poll follows on the heels of a slew of other surveys showing Warren taking the lead from Biden. A Des Moines Register/CNN/Mediacom poll released last weekend showed her at 22 percent support, edging out Biden at 20 percent. And a Monmouth University poll found her leading Biden in New Hampshire, 27 percent to 25 percent.

Likewise, a Quinnipiac University national poll released on Wednesday showed Warren leading the pack with 27 percent support. Biden came in second place in that survey, with 25 percent support.

Still, the Harvard CAPS/Harris Poll survey released on Thursday showed that a plurality of voters — 34 percent — perceive Biden as the candidate with the best chance of defeating President TrumpDonald John TrumpPolice say man dangling off Trump Tower Chicago demanding to speak with Trump Fauci says he was 'absolutely not' surprised Trump got coronavirus after Rose Garden event Biden: Trump 'continues to lie to us' about coronavirus MORE in 2020. Sanders and Warren are statistically tied for second place on that front, scoring 12 percent and 11 percent, respectively.

The Harvard CAPS/Harris Poll surveyed 693 registered Democratic voters from Sept. 22-24. 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.