A Fox News poll released Wednesday showed more than half of registered voters do not believe President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE will be reelected in 2020.

The poll found that 52 percent of those surveyed do not think Trump will win reelection, compared to 39 percent of registered voters surveyed who believe he will secure a second term.

Asked who they would vote for if the election were held today, 38 percent of voters said they would support Trump, while 55 percent said they would vote for someone else.

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Thirty percent of respondents said they would “definitely” vote to reelect Trump, compared to 47 percent who indicated they would “definitely” vote for someone else, the poll found.

A Fox News poll published in December 2010 showed 29 percent of voters thought then-President Obama would be reelected. Obama won a second term in 2012.

Wednesday's poll asked registered Democrats for their opinions on a host of potential 2020 Democratic presidential candidates. Respondents gave the highest marks to former Vice President Joe Biden Joe BidenBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Democratic groups using Bloomberg money to launch M in Spanish language ads in Florida Harris faces pivotal moment with Supreme Court battle MORE and Sen. Bernie Sanders Bernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE (I-Vt.), the poll found.

The poll surveyed 1,006 registered voters from Dec. 9-11, and has a margin of error of 3 percentage points.

Trump filed paperwork to run for reelection the day he was inaugurated in January 2017. At a press conference last month, Trump asked Vice President Pence to be his running mate in 2020 in an impromptu exchange prompted by a reporter's question.

The president has in recent months attacked a host of potential Democratic challengers in 2020, chastising Biden, Sanders, Sen. Elizabeth Warren Elizabeth WarrenDimon: Wealth tax 'almost impossible to do' CNN's Don Lemon: 'Blow up the entire system' remark taken out of context Democrats shoot down talk of expanding Supreme Court MORE (D-Mass), Sen. Cory Booker Cory Anthony BookerBipartisan praise pours in after Ginsburg's death DHS opens probe into allegations at Georgia ICE facility Democratic lawmakers call for an investigation into allegations of medical neglect at Georgia ICE facility MORE (D-N.J.) and others on social media and during midterm campaign rallies.

Each of those people is said to be considering a presidential bid, but has not formally announced whether they will run.