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 is the only top Democratic presidential contender who would beat 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 in Ohio, according to a new poll.

Biden leads Trump 50 percent to 42 percent, according to a Quinnipiac University poll released Thursday. Some other top Democratic candidates poll extremely close to the president in the swing state, but do not lead.

In a match-up between Trump and 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.), 46 percent of Ohio voters surveyed said they would back Trump and 45 percent would back Sanders, the poll found. Similarly, 46 percent would choose Trump and 45 percent would choose 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.) in a match-up between the two.

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The poll found that 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.) and 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 (D) tie the president, with all the candidates receiving 44 percent in hypothetical head-to-head match-ups.

Of Democratic or Democratic-leaning voters. Biden holds a 17-point lead in the Democratic primary, with 31 percent of voters saying they would choose the former vice president for the nomination. Sanders and Harris finished tied for second with 14 percent each, with Warren in third with 13 percent.

“Former Vice President Joseph Biden calls himself a blue-collar guy,” Quinnipiac University Poll assistant director Peter Brown said in a statement. “With Ohio certainly a blue-collar state, it is no surprise he is the Democrat who runs best against President Donald Trump and is solidly ahead in the Democratic primary in the Buckeye State.”

“Biden runs best against President Trump in every Quinnipiac University state poll so far," he added. "To get reelected, Trump will need to win the industrial Midwest. Ohio certainly is key to that plan.”

Quinnipiac surveyed 1,431 Ohio voters between July 17-22. The results have a margin of error of 3.2 percentage points.

There are more than two dozen candidates running for the Democratic nomination.

Biden will be one of 20 to square off in the second Democratic primary debates in Detroit next week.