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

A Fox News poll released Thursday showed President TrumpDonald John TrumpGraham: America must 'accept the pain that comes in standing up to China' Weld 'thrilled' more Republicans are challenging Trump New data challenges Trump's economic narrative 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 SandersTrump preps conspiracy theory to explain faltering economy Sanders doubles down on 'Medicare For All' defense: 'We have not changed one word' Sanders, Warren back major shift to fight drug overdoses MORE (I-Vt.), Kamala HarrisKamala Devi HarrisSanders doubles down on 'Medicare For All' defense: 'We have not changed one word' Obama reveals his summer playlist Democratic candidates face hard choices as 2020 field winnows MORE (D-Calif.), and Elizabeth WarrenElizabeth Ann WarrenTrump preps conspiracy theory to explain faltering economy Sanders, Warren back major shift to fight drug overdoses Rendell: Biden 'baked in' as Democratic nominee 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 BidenScaramucci attends charity event featuring Biden in the Hamptons Klobuchar knocks Trump: 'This negotiating by tweet hasn't been working' Rendell: Biden 'baked in' as Democratic nominee 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.