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 (D) holds a comfortable lead over his competition in a new poll of the 2020 Democratic primary field.

A USA Today/Suffolk University poll released Wednesday found Biden beats his closest rival, 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.), by 15 points. Biden registered support from 30 percent of registered voters in the poll, while Sanders was supported by 15 percent.

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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.) took third place with the support of 10 percent of voters, the only other candidate to score double digits in the poll. Warren, however, topped Sanders and Biden among voters' likely second-choice picks, with Sanders coming in second place as voters' choice for whom to support if their top candidate dropped out.

"After front-runner Joe Biden, Elizabeth Warren is the one who finishes in the money most," Suffolk poll director David Paleologos told USA Today. "Warren polls as the second or third-place choice four times out of ten, followed by Sanders (three times), Harris (twice) and Buttigieg (once)."

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 held a slight advantage against a generic Democratic opponent among voters in the poll, who said they would support the president for reelection by 40 percent to a generic Democratic challenger's 37 percent. Fourteen percent of voters told pollsters that they were undecided as to the general election.

The poll, which was conducted between June 11-15, surveyed 385 likely Democratic primary voters and 618 voters overall. The margin of error among Democratic voters is 5 percentage points, and 3 percentage points for the poll overall.