In nominating him, the White House said Durham and other nominees for USA attorney jobs share Trump's vision for "making America safe again". "This whole issue has become highly partisan and that's always treacherous waters".
Durham has been involved in the internal investigation for "several weeks" now, according to the source.
"Well I didn't understand his answer because I thought the attorney general answered it perfectly", Trump said, adding that Wray's response to lawmakers was "ridiculous".
Durham has remained mum on his work for the Trump administration. The Senate confirmed his nomination on February 16 past year. "I'd wait for the outcome of that to determine if there needs to be more investigations".
Steele was hired by the research firm Fusion GPS, which had also worked for a firm representing Hillary Clinton's presidential campaign and the Democratic National Committee, so the president and his Republican allies called it a "fake dossier" that was politically motivated.
Mueller completed his probe in March.
Mueller was appointed after Trump fired former FBI Director James Comey.
Former U.S. attorney and Fox News contributor Andy McCarthy said it's "ridiculous" that some Democrats are complaining about Attorney General William Barr's review of the origins of the Russian Federation investigation.More news: Kevin Durant has mild calf strain as Warriors, Knicks mostly exhale
The FBI was accused of misleading the FISA court in 2016, while seeking a warrant on Trump campaign volunteer Carter Page, by basing its warrant request on the unverified information collected by retired British spy Christopher Steele, but telling the courts the information was "corroborated" and "reliable".
And on Tuesday, Trump told reporters he "didn't understand" FBI Director Christopher Wray's "ridiculous" answer that the FBI didn't spy when looking into then-candidate Trump's ties to Russian Federation during the 2016 election. "He's independent, he's tireless and he's very, very experienced so I think in many ways it's a natural choice".
As he left the White House on Tuesday for a trip to Louisiana, Trump referred to Mueller's investigation as a "hoax" - as he has frequently done in the past - and said he hadn't asked Barr to open the inquiry and hadn't known about it in advance.
Durham has served in the USA attorney's office since 1989, holding a number of positions, including acting US attorney. In 2009, President Barak Obama's Attorney General Eric H. Holder Jr. expanded the scope of Durham's inquiry into investigating whether the CIA's abuse of detainees violated any laws.
In a speech in Baltimore Monday evening, former deputy attorney general Rod Rosenstein said he believed the investigation "was justified, and closing it was not an option".
Durham, the United States attorney in CT, has a history of serving as a special prosecutor investigating potential wrongdoing among national security officials, including the F.B.I.'s ties to a crime boss in Boston and accusations of C.I.A. abuses of detainees.
The U.S. Attorney's Office for the District of CT declined to comment on Durham's appointment. He's been an Assistant U.S. Attorney in various positions in CT for 35 years.
Some Republicans, however, wanted the Justice Department to appoint a special counsel, who would have broader powers and more independence, to investigate the origins of the Russian Federation probe.