One in four Americans think President Trump acted illegally in terms of his 2016 campaign's alleged involvement with Russian officials, according to a Gallup poll released Wednesday.

Another 37 percent of Americans said Trump acted unethically but not illegally, while 35 percent said they believed he did nothing wrong.

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Sixty-nine percent of Republicans and Republican-leaning independents told Gallup the president did nothing wrong regarding Russia, while just 4 percent of Democrats and Democratic-leaning independents said they believe Trump did nothing wrong.

The poll comes amid the ongoing federal probe and congressional investigations into Russian election interference and alleged ties between the Trump campaign and Moscow.

Special counsel Robert Mueller, who was appointed by the Justice Department to probe the matter, has impaneled a Washington, D.C., grand jury that can issue indictments if he decides to bring charges.

Mueller has also delved into Trump's business and financial ties, despite a very public warning from the president not to do so.

It was reported Wednesday that FBI agents raided the home of former Trump campaign chairman Paul Manafort last month.

Gallup reported that 29 percent of those surveyed in 1998 thought then-President Bill Clinton William (Bill) Jefferson ClintonDolly Parton remembers Ginsburg: 'Her voice was soft but her message rang loud' Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Calls grow for Biden to expand election map in final sprint MORE acted illegally in the Whitewater real estate deal. In that same poll, 31 percent felt then-first lady Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE had acted illegally in the same matter.

In 2006, 21 percent felt then-President George W. Bush acted illegally regarding intelligence information that was leaked to reporters.

The Gallup poll was conducted Aug. 2-6 via telephone interviews among 1,017 people.