US President Donald Trump says he is “100%” willing to speak under oath about his conversations with ex-FBI chief James Comey.
Speaking at the White House, he denied having asked for Mr Comey’s loyalty or for an inquiry into a former White House aide to be dropped.
“James Comey confirmed a lot of what I said, and some of the things he said just weren’t true,” Mr Trump said.
Meanwhile, a congressional panel asked for any tapes of their conversations.
Mr Comey says Mr Trump fired him because of his Russia inquiry.
The former FBI chief was investigating an alleged Kremlin plot to sway last year’s US election in favour of Mr Trump, and whether there was any collusion with the president or his campaign staff.
On Thursday, Mr Comey testified to one of several congressional committees that is also looking into the Russia claims.
He said the president had pressured him to drop a probe into former National Security Adviser Michael Flynn, whom Mr Trump fired for misleading the White House over contacts with Moscow’s ambassador.