A Fox News poll released Wednesday showed more than half of registered voters do not believe President TrumpDonald John TrumpDem lawmaker says Electoral College was 'conceived' as way to perpetuate slavery Stanley Cup champion Washington Capitals to visit White House on Monday Transportation Dept requests formal audit of Boeing 737 Max certification 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 BidenJoseph (Joe) Robinette BidenTrump: 'I was never a fan of John McCain and I never will be' Poll: Biden rises to 8-point lead over Sanders among Democratic primary voters Andrew Yang draws crowd of 3,000 in San Francisco MORE and Sen. Bernie SandersBernard (Bernie) SandersAlan Dershowitz: In defense of Chelsea Clinton O'Rourke: Decisions on late-term abortions 'best left to a woman and her doctor' CNN to host town hall with Cory Booker in South Carolina 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 WarrenElizabeth Ann WarrenDem lawmaker says Electoral College was 'conceived' as way to perpetuate slavery GOP rep to introduce constitutional amendment to limit Supreme Court seats to 9 Warren introduces petition to end the Electoral College MORE (D-Mass), Sen. Cory BookerCory Anthony BookerCNN to host town hall with Cory Booker in South Carolina O'Rourke sees 'a lot of wisdom' in abolishing Electoral College Gillibrand: Aide who claimed sexual harassment was 'believed' 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.