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

A Fox News poll released Thursday showed President Trump Donald John TrumpGibraltar releases Iranian tanker despite US move to block it Warren leads Democratic field by 5 points in Wisconsin: poll Stephen Colbert on Trump: 'He's trying to invite us into this madness' 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 Sanders Bernie SandersWarren leads Democratic field by 5 points in Wisconsin: poll Harris wins endorsement of former CBC Chair Marcia Fudge Ex-CIA chief worries campaigns falling short on cybersecurity MORE (I-Vt.), Kamala Harris Kamala Devi HarrisWarren leads Democratic field by 5 points in Wisconsin: poll The danger of using race and politics to declare guilt or innocence Ben Shapiro: It's a 'you problem' if you 'had to work more than one job' MORE (D-Calif.), and Elizabeth Warren Elizabeth Ann WarrenWarren leads Democratic field by 5 points in Wisconsin: poll The danger of using race and politics to declare guilt or innocence Harris wins endorsement of former CBC Chair Marcia Fudge 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 Biden Joe BidenWarren leads Democratic field by 5 points in Wisconsin: poll O'Rourke says Trump 'terrorizing' immigrants in campaign relaunch speech Harris wins endorsement of former CBC Chair Marcia Fudge MORE, meanwhile, beat Trump in the theoretical matchup with 50 percent support among those surveyed, compared to Trump's 38 percent.

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.