President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE’s campaign and several of its associates have reportedly begun handing over documents to the Senate Judiciary Committee for its probe into Russia’s election interference.

A spokesperson for the committee told Bloomberg that the campaign sent over more than 20,000 pages of documents on Aug. 2.

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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, who at one point served as Trump’s campaign chairman, turned over 400 pages on the same day, the report said.

Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE, who has been at the center of the controversy surrounding the campaign’s meeting with a Russian lawyer after being promised harmful information about Democrat 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, gave the committee 250 pages of documents on Aug. 4.

The committee requested documents related to any efforts to gain information about Clinton, the meeting with Russian lawyer Natalia Veselnitskaya, and any coordinated efforts between Trump campaign staff members and Russian associates seeking to interfere in the presidential election.