Fox News poll shows Trump losing to Biden, Warren, Sanders and Harris

A Fox News poll released Thursday showed President TrumpDonald TrumpJudge rules Alaska governor unlawfully fired lawyer who criticized Trump Giuliani led fake electors plot: CNN Giuliani associate sentenced to a year in prison in campaign finance case MORE losing head-to-head matchups against four of the top Democratic presidential primary contenders.

The poll found Trump with 39 percent support among registered voters in head-to-head matchups against Sens. Bernie SandersBernie SandersFilibuster becomes new litmus test for Democrats Gallego says he's been approached about challenging Sinema Democrats call on Biden administration to ease entry to US for at-risk Afghans MORE (I-Vt.), Kamala HarrisKamala HarrisTlaib blasts Biden judicial nominee whose firm sued environmental lawyer These Senate seats are up for election in 2022 Trump by the numbers: 2024 isn't simple MORE (D-Calif.), and Elizabeth WarrenElizabeth WarrenDemocrats call on Biden administration to ease entry to US for at-risk Afghans Biden stiff arms progressives on the Postal Service Trump by the numbers: 2024 isn't simple MORE (D-Mass.). The poll found Sanders beating Trump with 48 percent, Warren winning over Trump with 45 percent and Harris winning with 46 percent support.

Former Vice President Joe BidenJoe BidenNew York woman arrested after allegedly spitting on Jewish children Former Sen. Donnelly confirmed as Vatican ambassador Giuliani associate sentenced to a year in prison in campaign finance case MORE, meanwhile, beat Trump in the theoretical matchup with 50 percent support among those surveyed, compared to Trump's 38 percent.

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Among Democratic primary contenders, Warren saw the largest gain in support in the poll — an 8 percent jump from last month's survey. Warren, according to the poll, took second place behind Biden with the support of 20 percent of Democratic primary voters.

Sanders dropped to third, now at 10 percent in the poll and the only other candidate aside from Warren and Biden scoring double digit support among voters.

Biden dropped slightly in the poll from a previous Fox News poll in July, from 33 percent to 31 percent, but remains the clear front-runner in the race according to the survey.

The Fox News poll was taken between Aug. 11-13 and contacted 1,013 registered voters on landlines and cellphones. The margin of error is plus or minus 3 percent for all registered voters, and 4.5 percent for Democratic primary voters.