President Donald Trump has questioned the neutrality of Robert Mueller, who is investigating Russian interference in last year’s US election, BBC report.
Mr Trump said Mr Mueller’s friendship with James Comey, who had been heading the inquiry until sacked from his role as FBI chief, was “bothersome”.
Asked on Fox News whether Mr Mueller should step down, Mr Trump said: “We’re going to have to see.”
However, Mr Trump did call Mr Mueller an “honourable man”.
Mr Mueller was given the role of special counsel by the justice department to lead its investigation into alleged Russian interference after Mr Comey was sacked on 9 May.
Mr Mueller has not given any details of his investigation but US media have reported he is investigating Mr Trump for possible obstruction of justice, both in the firing of Mr Comey and whether Mr Trump tried to end an inquiry into sacked national security adviser Michael Flynn.
President Trump has repeatedly denied any collusion with Russia, calling it a “witch hunt”.
He did so again in his interview with Fox & Friends on Friday, saying “there has been no obstruction. There has been no collusion.”
He called the accusations of obstruction of justice “ridiculous”.
Asked whether Mr Mueller should recuse himself from the inquiry because of his friendship with Mr Comey, Mr Trump said: “Well he’s very, very good friends with Comey which is very bothersome. But he’s also… we’re going to have to see.”
He also said that “the people that’ve been hired were all Hillary Clinton supporters”.