Former Vice President Joe Biden Joe BidenPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Hillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Fox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio MORE has a 2-to-1 lead nationally over the next closest Democratic presidential contender after the second round of debates, according to the latest Harvard CAPS/Harris Poll.

The new survey finds Biden with 34 percent support among Democrats, followed by Sen. Bernie Sanders Bernie SandersThe Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power Bernie Sanders: 'This is an election between Donald Trump and democracy' The Hill's 12:30 Report: Trump stokes fears over November election outcome MORE (I-Vt.) at 17 percent.

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Sen. Kamala Harris Kamala HarrisHundreds of lawyers from nation's oldest African American sorority join effort to fight voter suppression Biden picks up endorsement from progressive climate group 350 Action 3 reasons why Biden is misreading the politics of court packing MORE (D-Calif.) is in third place with 9 percent support, followed by Sen. Elizabeth Warren Elizabeth WarrenHillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns On The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline Democratic senators ask inspector general to investigate IRS use of location tracking service MORE (D-Mass.) at 8 percent, 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 at 4 percent, former Texas Rep. Beto O’Rourke at 3 percent and Sen. Cory Booker Cory Anthony Booker3 reasons why Biden is misreading the politics of court packing Bipartisan praise pours in after Ginsburg's death DHS opens probe into allegations at Georgia ICE facility MORE (D-N.J.) at 2 percent.

“Biden has been steady despite some rocky performances at the debates,” said Mark Penn Mark PennThe Supreme Court vacancy — yet another congressional food fight Trump, Biden battle over rush for COVID-19 vaccine The 7 keys to victory in the presidential race MORE, co-director of the Harvard CAPS/Harris Poll. “The Democratic voters are far more in sync with Biden’s views than any of the other candidates running. He maintains his front-runner status.”

The Harvard CAPS/Harris Poll of 585 registered Democratic voters was conducted between July 31 and Aug. 1. The first night of this week's Democratic debates took place on July 30 and the second night was July 31, so some of the respondents may not have viewed the second night of debate, when Biden appeared.

Biden’s lead is down some from the previous survey conducted in late May, before the Democratic debates. At the time, the poll showed Biden holding a 30-point lead over Sanders and registering 44 percent support among Democrats.

But the former vice president remains in a strong position, with 46 percent of Democrats viewing him as having the best chance to defeat President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE. Fifteen percent of Democrats said Sanders has the best shot at knocking off Trump, followed by Warren at 7 percent and Harris at 6 percent.

A plurality of Democrats, 47 percent, said they want to nominate a candidate with the strongest chance of winning. Only 12 percent said their first preference is a candidate who shares their positions, while 36 percent said they value both traits equally.

Biden also leads when voters are asked to name the top three candidates that best share their values, with 46 percent saying Biden, followed by Sanders at 34 percent, Warren at 27 and Harris at 24.

Health care is by far the top issue for Democratic voters, with 45 percent calling it their top priority, followed by immigration at 29 percent and jobs and the economy at 20 percent.

The Harvard CAPS/Harris 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.