A Democratic senator has called upon President Donald Trump to testify to Congress about his conversations with former FBI Director James Comey.
Comey testified to Congress June 8, one month after Trump fired him, The Hill reported.
Sen. Chris Murphy released a statement urging Trump to testify. Sitting presidents rarely testify to Congress.
"What's most important is that investigators in the Senate and at the Department of Justice get all the facts and find the truth," said Murphy, according to The Hill.
Comey told the Senate that Trump had asked him for a pledge of loyalty and once encouraged him to shut down the FBI investigation into former National Security Adviser Michael Flynn.
"If the White House's account differs from what we heard today, the American people deserve to here the president's side of the story in a similar forum under oath and open to the press," added Murphy.
Trump initially stated he had fired Comey because of his alleged mishandling of the FBI's investigation into Hillary Clinton's emails during the 2016 election campaign. At a press conference last month, Trump denied ever having asked Comey for a pledge of loyalty.
Comey told the Senate Intelligence Committee that the Trump administration had spread "lies, plain and simple," The Associated Press reported.
He added that this was why he wrote memos about his interactions with Trump.
"I was honestly concerned that he might lie about the nature of our meeting, so I thought it really important to document," Comey said during his testimony. "I knew there might come a day when I might need a record of what happened not only to defend myself but to protect the FBI."
Comey was also asked if he was fired because of the FBI's investigation into Russia's alleged involvement in the 2016 election and the Kremlin's possible ties with the Trump campaign.
"Yes," Comey answered. "Because I've heard the president say so."
Comey reaffirmed the position of the intelligence services on Russian involvement.
"There should be no fuzz on this," Comey said. "The Russians interfered. That happened. It's about as unfake as you can possibly get."
Trump has referred in the past to the Russia investigation as a "witch hunt." However, he has acknowledged that Russia intervened in the election.
Marc Kasowitz, Trump's private attorney, took aim at Comey following the testimony.
"It is overwhelmingly clear that there have been and continue to be those in government who are actively attempting to undermine this administration with selective and illegal leaks of classified information and privileged communications," he said. "Mr. Comey has now admitted that he is one of these leakers."