PUBLISHED: 02:32, Tue, Sep 15, 2020 | UPDATED: 02:33, Tue, Sep 15, 2020
The poll said 51 percent of Americans “think Joe Biden has the mental soundness to serve effectively as president”.
While only 47 percent believe Mr Trump has the mental soundness to be the US president.
The Fox News poll came just days after the release of a CNBC-Change Research voter survey.
The survey asked voters in Florida, North Carolina, Arizona, Michigan, Wisconsin and Pennsylvania if they believed the two US presidential candidates were mentally sound enough to do the job.
Donald Trump praised Vladimir Putin and Kim Jong-un as more fit to lead than Joe Biden (Image: getty)
Donald Trump news: 52 percent of voters said Joe Biden was not fit for the job (Image: getty)
The data revealed that 51 percent of American voters thought Mr Trump is unfit to be president.
While 52 percent said Mr Biden was not fit for the job.
In the Fox News poll, 52 percent of people asked said they believed Mr Trump was physically fit enough to be president.
Whereas, 54 percent said Mr Biden was physically fit to take the job.
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Donald Trump news: On Monday, journalist Julia Davis tweeted (Image: Twitter)
The 74-year-old Republican president has repeatedly criticised the 77-year-old former Democratic vice president over his ability to lead during