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

A Fox News poll released Thursday showed President TrumpDonald John TrumpTrump's newest Russia adviser, Andrew Peek, leaves post: report Hawley expects McConnell's final impeachment resolution to give White House defense ability to motion to dismiss Trump rips New York City sea wall: 'Costly, foolish' and 'environmentally unfriendly idea' 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 SandersBiden alleges Sanders campaign 'doctored video' to attack him on Social Security record Sanders campaign responds to Biden doctored video claims: Biden should 'stop trying to doctor' public record The Memo: Sanders-Warren battle could reshape Democratic primary MORE (I-Vt.), Kamala HarrisKamala Devi HarrisParnas pressure grows on Senate GOP Sanders defends vote against USMCA: 'Not a single damn mention' of climate change The Hill's Morning Report — President Trump on trial MORE (D-Calif.), and Elizabeth WarrenElizabeth Ann WarrenThe Memo: Sanders-Warren battle could reshape Democratic primary Environmental activists interrupt Buttigieg in New Hampshire Pence to visit Iowa days before caucuses 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 BidenBiden alleges Sanders campaign 'doctored video' to attack him on Social Security record Sanders campaign responds to Biden doctored video claims: Biden should 'stop trying to doctor' public record Capt. "Sully" Sullenberger pens op-ed in defense of Biden: 'I stuttered once, too. I dare you to mock me' 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.