According to the document, the investigation did not find any evidence of collusion between Russian Federation and Trump's campaign team.
The review that Barr has commissioned is broad-based and includes working with Wray, CIA Director Gina Haspel and Director of National Intelligence Dan Coats, according to the person.
Conservative radio host Rush Limbaugh said Tuesday that the appointment of federal prosecutor John Durham to examine the origins of the Trump-Russia investigation is sending shockwaves through Washington. "I didn't know it, but I think it's a great thing that he did it".
The attorney-general has been accused of pandering to repeated claims by Mr Trump that his predecessor had a spy illegally placed into his campaign and that the Mueller investigation was politically motivated.
The Justice Department's inspector general is expected in the coming weeks to complete a probe into whether any abuses were committed when the Federal Bureau of Investigation obtained a secret Foreign Intelligence Surveillance Act warrant to spy on former Trump campaign aide Carter Page.
The Justice Department inspector general, Michael Horowitz, is also investigating whether political bias influenced investigation decisions related to the president and his campaign. "He's totally above politics", said Starr, noting that the Obama administration gave Durham some key assignments, including an investigation of Central Intelligence Agency detainees.
Durham is a career prosecutor who was nominated for his post as US attorney in CT by Trump.
Durham, who has been with the Department of Justice since 1982, has led high-profile investigations such as a probe into the FBI's handling of informant and organized crime leader Whitey Bulger and the investigation into the CIA's destruction of videos allegedly showing torture of terrorism suspects.
The former attorney general Jeff Sessions had appointed another USA attorney, John Huber, in March 2018 to review aspects of the Russian Federation investigation, following grievances from Republican lawmakers.
Durham was named by Barr several weeks ago, said the source, who confirmed it to Reuters anonymously because the Justice Department has not made a public announcement. "It's a waste of his talent", Blumenthal said.