In a letter to the Republican and Democratic leaders of the congressional judiciary committees, Barr noted on Friday that the department had not denied any request from Mueller, something Barr would have been required to disclose to ensure there was no political interference. Trump was never interviewed in person by Mueller’s team but submitted answers to questions in writing.
Throughout the investigation into Russia’s interference in the 2016 presidential election, court filings and news media revealed numerous instances of contacts with Russians.