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 leads the field of Democratic presidential hopefuls, with Sens. 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.) and 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.) tied for second place, according to a new national poll.

A survey released Friday from NBC News-Survey Monkey finds Biden at 25 percent support, a 9-point lead over Sanders and Warren, who are tied for second place with 16 percent support each. 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 (Calif.) is close behind, with 14 percent support.

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The NBC News-Survey Monkey online survey was conducted in the two weeks following the first Democratic debate, between July 2 and July 16.

The results are in line with what most other recent polls have found. Biden maintains a significant but not insurmountable lead over the field. Sanders has held steady in the front of the pack of candidates chasing Biden, while Warren and Harris have cemented their standing alongside him as top contenders for the nomination.

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, who raised more money in the second quarter than any other candidate, is in fifth place at 8 percent in the poll. Former Rep. Beto O’Rourke (Texas), whose fundraising fell dramatically this quarter, is at 3 percent, along with 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 (N.J.). Every other candidate is at 2 percent or less.

The survey also found 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’s approval rating at 48 percent, up from 45 percent in September. Fifty-one percent of voters said they disapprove of the job Trump is doing, down from 54 percent.

According to data from Gallup, Trump posted the best average approval rating of his presidency in the second quarter of 2019 at 42.9 percent, beating his previous best of 41.9 percent. The latest Gallup survey found Trump’s approval rating at 44 percent, down from his high of 46 percent in mid-April.

The NBC News-Survey Monkey poll does not fully account for Trump’s latest racial controversy, in which he said four Democratic women of color should “go back” to other countries.

At a reelection rally last night in North Carolina, Trump ramped up his criticism, provoking the crowd to break into a chant of “send her back” in reference to Rep. Ilhan Omar Ilhan OmarOmar fires back at Trump over rally remarks: 'This is my country' Trump attacks Omar for criticizing US: 'How did you do where you came from?' Democrats scramble on COVID-19 relief amid division, Trump surprise MORE (D-Minn.), a U.S. citizen from Somalia.

However, the poll found that Trump’s focus on the migrant crisis at the southern border may be impacting public opinion. A plurality of voters, 22 percent, said immigration is the most important issue to them, up from 15 percent in the previous survey, followed by 21 percent who said health care and 21 percent who said jobs.

The NBC News-Survey Monkey poll of 13,533 registered voters was conducted online and has a 1.2 percentage point margin of error.