Americans say they believe adult-film star Stormy Daniels more than they believe President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE, according to a new poll.

The Economist/YouGov survey released Thursday found that 34 percent of respondents said they believe Daniels, compared to 30 percent who said they believe Trump. Thirty percent said they don't believe either one, and 6 percent said both are equally trustworthy.

Daniels alleges that she had an affair with Trump in 2006. She is suing over a nondisclosure agreement about the alleged affair, claiming that the document is void because Trump did not sign it.

Trump has said there was no affair.

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Respondents in the poll were divided mostly along party lines, with 63 percent of Democrats backing Daniels over Trump, and 72 percent of Republicans siding with the president.

Daniels is also suing Trump for libel, alleging that he publicly undermined her reputation and cast doubt on her allegation that a man threatened her to keep quiet about the alleged affair.

The libel case was moved from a New York court to Los Angeles last week.

The Economist/YouGov poll surveyed 1,500 U.S. adults online Aug. 5-7. The survey has a margin of error of 3.1 percentage points.