Donald Trump has given the US attorney general permission to share classified information about the Russia investigation with Devin Nunes, the Republican House Intelligence Committee ranking member who has called for Justice Department and FBI officials to be jailed over the probe.

The US president said he had given William Barr “a total release” of documents relating to the investigation into Moscow’s interference in the 2016 election, and had also “given him authorisation to release it to whoever he wants”.

“He’s got everything; everything he needs, he’s got,” he told Sean Hannity in an interview on Fox News on Thursday night.

Mr Trump added: “He’s the attorney general of the United States, he’s has got a lot of very good people under him that I guess are involved and I gave them a total release. So, all of it’s been released and he has all of it.

“I’ve also given him authorisation to release it to whoever he wants, whether it’s his people or frankly perhaps people like Devin Nunes, who is a star.”

Mueller investigation: The key figures Show all 12 1 /12 Mueller investigation: The key figures Mueller investigation: The key figures Robert Mueller is the special counsel overseeing the investigation into Russia's meddling in the 2016 election, and potential obstruction of justice by the president. Mr Mueller has a pristine reputation in Washington, where he was previously in charge of the FBI. Throughout his investigation, he and his team have been notoriously tight lipped about what they know and where their investigation has led. REUTERS Mueller investigation: The key figures Former FBI director James Comey was the catalyst that led to the appointment of special counsel Robert Mueller. Mr Comey was fired by the president after Mr Trump reportedly asked him to drop his own Russia investigation. Mr Trump has long maintained that the investigation is a "witch hunt". AFP/Getty Images Mueller investigation: The key figures Deputy attorney general Rod Rosenstein had authority over the special counsel investigation for much of the two years it has been active. Mr Rosenstein found himself with that responsibility after then-attorney general Jeff Sessions recused himself from that oversight. AP Mueller investigation: The key figures Attorney general Jeff Sessions's decision to recuse himself from oversight of the special counsel investigation may have cost him his job in the end. Mr Sessions resigned last year, after weathering a contentious relationship with Donald Trump who vocally criticised his attorney general for taking a step back. Mr Sessions recused himself from the oversight citing longstanding Justice Department rules to not be involved in investigations overseeing campaigns that officials were apart of. AP Mueller investigation: The key figures Attorney General William Barr is currently responsible for oversight of the special counsel investigation. Mr Barr's office will be the first to receive the Mueller report when it is finished. His office will then determine what portion or version of that report should be delivered to Congress, and also made public. EPA Mueller investigation: The key figures Michal Cohn is the president's former personal lawyer, who has been helping the special counsel investigation as a part of a plea deal over financial crimes, and campaign finance crimes, he has pleaded guilty to. Among those crimes, Cohen admitted to facilitating $130,000 in hush money payments to adult film actress Stormy Daniels during the 2016 campaign. Cohen has said he did so at the direction of Mr Trump. Cohen has also admitted that he maintained contacts with Russian officials about a potential Trump real estate project in Moscow for months longer than Mr Trump and others admitted. The talks continued well into 2016 during the campaign, he has said. AP Mueller investigation: The key figures Stormy Daniels has alleged that she had an affair with Donald Trump in 2006, soon after Melania Trump gave birth to Baron Trump. The accusation is of particular importance as a result of the $130,000 hush money payment she received to keep quiet about the affair during the 2016 campaign. AP Mueller investigation: The key figures Paul Manafort was Donald Trump's former campaign chairman. Manafort was charged alongside Rick Gates for a slew of financial crimes, and was convicted on several counts in a Virginia court. He then pleaded guilty to separate charges filed in a Washington court. Manafort has been sentenced to just 7.5 years in prison for his crimes — in spite of recommendations from the special counsel's office for a much harsher sentence. AP Mueller investigation: The key figures George Papadopoulos was one of the first individuals associated with the Trump campaign to be charged by the Mueller probe. He ultimately received a 14 day prison sentence for lying to investigators about contacts he had with Russian officials. AP Mueller investigation: The key figures Roger Stone is a well known political fixer and operative, who has made a name for himself for some dirty tactics. He has been charged by the Mueller probe earlier this year, and he has been said to have had prior knowledge that WikiLeaks planned on publishing stolen emails from the Hillary Clinton campaign in 2016. Getty Images Mueller investigation: The key figures Rick Gates was charged alongside former Trump campaign chairman Paul Manafort for a range of crimes. Gates, who worked alongside Manafort for a pro-Russia Ukrainian political party. The two were charged with conspiracy and financial crimes. Gates pleaded guilty. AP Mueller investigation: The key figures Former national security adviser Michael Flynn was one of the first casualties of the Russia scandal, and was forced out of his position in the White House weeks after Donald Trump took office. Flynn pleaded guilty in 2017 to "willfully" making fraudulent statements about contacts he had with Russian officials including former Russian ambassador to the US Sergey Kislyak. Flynn then lied to Vice President Mike Pence about that contact. REUTERS

Mr Nunes, the former chair of the House Intelligence Committee, this week portrayed allegations that Mr Trump’s presidential campaign team colluded with Russia as a “hoax” comparable to “the Loch Ness monster”.

Earlier this month, he described officials who triggered Robert Mueller’s Russia investigation as “a bunch of dirty cops”.

“Some of them better go to jail, or we're going to go down in a spiral in this country because you will not have a Republican that will trust the FBI or the Department of Justice for generations to come,” he told Fox News presenter Bill Hemmer.

Mr Mueller, giving testimony on Capitol Hill on Wednesday, rejected Mr Trump's claims to have been been exonerated by the special counsel's report.

"That is not what the report said. The president was not exculpated for the acts that he allegedly committed," he told congress.

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Mr Nunes has repeatedly been accused of attempting to undermine investigations into the Russia allegations.

In 2017, he was forced to temporarily recuse himself from the House Intelligence Committee’s probe while the Office of Congressional Ethics investigated his disclosure of intelligence files which he claimed showed Mr Trump’s transition team had been caught up in surveillance.

He reportedly received the files from White House officials and was criticised by both Democrats and Republicans for revealing information from classified documents.