Donald Trump’s former chief adviser has warned the US president is “going to go full animal” after he was partially exonerated by Robert Mueller’s investigation.

Steve Bannon, who left the White House in 2017, predicted Mr Trump would “come off the chains” and use the special counsel’s findings to “bludgeon” his opponents and ignore congressional oversight requests for documents.

William Barr, the attorney general, sent a four-page letter to Congress outlining Mr Mueller’s conclusions following the sprawling 22-month probe into whether the Trump campaign colluded with Russia or Mr Trump obstructed justice.

Mr Mueller cleared Mr Trump of conspiracy with Russia, but he did not draw a conclusion on an obstruction charge. Mr Barr, though, concluded the evidence in the report – which has not been made public – was not enough to bring a prosecution.

“When I saw no new indictments – I thought, Oh my God! They didn’t indict anybody regarding the Flynn investigation, they didn’t indict Don Jr,” Mr Bannon told Yahoo News before Mr Barr submitted his letter on Sunday.

Criminals who worked for Trump Show all 5 1 /5 Criminals who worked for Trump Criminals who worked for Trump Michael Cohen Former lawyer for Donald Trump was sentenced to three years in prison on counts involving evading income tax, false disclosure of the hush money paid to Stormy Daniels and another hush money charge Getty Criminals who worked for Trump Paul Manafort Former campaign manager for Trump Manafort was found guilty in February 2018 of five counts of tax fraud, two counts of bank fraud and one count of failure to disclose a foreign bank account. The crimes occurred prior to his appointment in Trump's campaign Getty Criminals who worked for Trump George Papadopoulos Former Trump campaign adviser Papadopoulos pleaded guilty to lying to the FBI in October 2017. He had lied about making contact with a professor who claimed that the Russians had dirt on Hillary Clinton. He was sentenced to 14 days in jail Getty Criminals who worked for Trump Michael Flynn Former White House National Security adviser Michael Flynn pleaded guilty to lying to the FBI in December 2017. He had lied about conversations that he had with the Russian ambassador to the US during Trump's Presidential campaign. He was not given prison time due to his "significant assistance" to the Mueller investigation Getty Criminals who worked for Trump Rick Gates Deputy chairman of Trump's presidential campaign Gates pleaded guilty to lying to the FBI in February 2018 AFP/Getty

“Maybe [Mueller] could have details about obstruction of justice that are not indictable, but are meaningful.”

Mr Trump on Tuesday morning appeared to live up to his former adviser’s prediction, tweeting angrily about the media’s coverage of the probe.

“The Mainstream Media is under fire and being scorned all over the World as being corrupt and FAKE,” he wrote. “For two years they pushed the Russian Collusion Delusion when they always knew there was No Collusion. They truly are the Enemy of the People and the Real Opposition Party!”