Senate Judiciary Committee Chairman Lindsey Graham Lindsey Olin GrahamSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (R-S.C.) said Friday evening that he expects to be "thoroughly" briefed on 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's report on his findings in the investigation into Russian interference in the 2016 election.

"I expect both Ranking Member [Dianne] Feinstein [D-Calif.] and I will be briefed more thoroughly about the report in the coming days," Graham said in a statement, noting that he had been informed by the Justice Department about the probe's end.

Graham was one of four lawmakers that Attorney General William Barr wrote to Friday announcing the report's submission. Barr also wrote to Feinstein, the top Democrat on the Senate Judiciary Committee, and the top Republican and Democrat on the House Judiciary panel.

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"I will work with Ranking Member Feinstein and our House Judiciary Committee colleagues to ensure as much transparency as possible, consistent with the law," Graham said. "I have always believed it was important that Mr. Mueller be allowed to do his job without interference, and that has been accomplished."

Graham, who is a top ally of 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 in Congress, also said that the fact Barr notified lawmakers that Mueller's report had been submitted indicates that the attorney general will "pursue as much transparency as possible."

Mueller submitted his highly anticipated report to Barr on Friday. Mueller was investigating whether Russia interfered in the 2016 election, including whether Russia colluded with the Trump campaign.

Trump has consistently denounced the probe, calling it a "witch hunt" and insisting he did not collude with Russia.