Special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE plans to ask President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE about his former campaign chairman Paul Manafort Paul John ManafortOur Constitution is under attack by Attorney General William Barr Bannon trial date set in alleged border wall scam Conspicuous by their absence from the Republican Convention MORE's possible outreach to Russia during the 2016 presidential campaign, according to interview questions obtained by The New York Times.

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The publication reported that Mueller wants to ask the president, "What knowledge did you have of any outreach by your campaign, including by Paul Manafort, to Russia about potential assistance to the campaign?”

Manafort has not yet been linked publicly to any campaign outreach to Russia.

He was charged last year in Mueller's probe along with a former business associate, Richard Gates, of hiding millions of dollars made from lobbying work in Ukraine from U.S. authorities.

Gates pleaded guilty to the charges this year, while Manafort has pleaded not guilty.

Manafort's trial is slated to begin in September.

The Times on Monday said it obtained the questions Mueller plans to ask Trump, which involve the president's past business dealings, his relationship with Moscow and his connections with former staffers who have been subjects in the probe.