Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.) leads the pack of Democratic presidential hopefuls but remains only narrowly ahead of former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE, according to a new Quinnipiac University poll released Monday.

The poll showed Warren in first place with 30 percent support among Democratic and Democratic-leaning voters nationally. Biden isn’t far behind. He notched 27 percent support in the survey, still within its 5.3 percentage point margin of error.

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The only other candidate to register double-digit support in the poll was Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.), who came in with 11 percent support. South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBillionaire who donated to Trump in 2016 donates to Biden The Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice MORE and Sen. Kamala Harris Kamala HarrisTexas Democratic official urges Biden to visit state: 'I thought he had his own plane' The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements A game theorist's advice to President Trump on filling the Supreme Court seat MORE (D-Calif.) rounded out the top five with 8 percent and 4 percent support, respectively.

The poll is the latest to show Warren’s candidacy on the rise. A similar survey from Quinnipiac released last week also placed the Massachusetts senator in the lead, with 29 percent support. That same poll showed Biden in second place, with 26 percent.

The latest Quinnipiac poll also shows a noticeable drop for Sanders, who has been off the campaign trail in recent weeks after suffering a heart attack. He fell from 16 percent in the survey released last week to 11 percent in the poll released on Monday, suggesting that his recent absence and lingering questions about his health may be taking a toll on his support.

For Warren, the poll also suggests that some voters who once doubted her ability to win the presidency in 2020 should she become the Democratic nominee are now more bullish about her candidacy.

Twenty-one percent of respondents said that she is the candidate with the best chance of beating President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE next year, up from 9 percent in another Quinnipiac poll released on Aug. 9.

Biden still leads the pack on that particular question. Forty-eight percent of respondents said that he was best suited to take on Trump in 2020, down only slightly from 49 percent in August.

The poll — one of several released in recent weeks that showed Biden losing ground to Warren — came a day before 12 candidates, including the two front-runners, take the stage in Westerville, Ohio, for the fourth Democratic presidential debate.

Tim Malloy, a polling analyst at Quinnipiac University, said that the latest survey — the third in a row from the university showing Warren in the lead — suggests that the Massachusetts Democrat has “staying power.”

That may be particularly valuable as she heads into the next debate, where her rising poll numbers could make her a target for her rivals for the Democratic nomination.

"For Senator Warren, the third straight time essentially tied at the top is the charm," Malloy said in a statement. "Her candidacy clearly has staying power going into the debate."

The Quinnipiac poll surveyed 505 Democratic voters and Democratic-leaning independents by telephone from Oct. 11 to 13 and had a margin of sampling error of plus or minus 5.3 percentage points.