He painted Mr Trump as a chief executive dismissive of the FBI's independence and made clear that he interpreted Mr Trump's request to end an investigation into the former national security adviser as an order coming from the president.
A friend of Mr Comey's is also being asked to hand over memos the former Federal Bureau of Investigation chief gave him. "I'm not going to say 'I want you to pledge allegiance.' Who would do that?"
US House and Senate investigators have requested former FBI Director James Comey's memos of his private discussions with President Donald Trump and any records the White House kept of their discussion including audio recordings.
The president had previewed his attacks against Comey in an early-morning tweet that broke his previous day's silence on his favorite social media megaphone. "And there'd be nothing wrong with it if I did say that, according to everybody that I read today, but I did not say that".
President Trump denied asking Mr Comey for his loyalty: "I hardly know the man". Who would ask a man to pledge allegiance under oath? It doesn't make sense. No, I didn't say that and I didn't say the other.
The White House has seized on Comey's confirmation that Trump personally was not under investigation over his ties to Russian Federation to declare a victory of sorts.
"No collusion. No obstruction". "Whether he obstructed justice, remains for the facts to come forward, and that's what we want are the facts". But yesterday showed no collusion, no obstruction. We are doing really well. That was an excuse by the Democrats, who lost an election that some people think they shouldn't have lost.
"Because it's nearly impossible for the Democrats to lose the Electoral College". So it was just an excuse, but we were very, very happy.More news: Clinging on to her job, Britain's May appoints new ministers
Mr Comey has said that the memos he wrote were unclassified. "And some of the things he said just weren't true".
Trump also addressed whether any tapes of his conversations with Comey existed.
The Russia investigation is now being handled by a high-powered special prosecutor.
Trump and his outside attorney, Marc Kasowitz, have zeroed in on this and lambasted Comey for ordering the "leaks".
"Lordy, I hope there are tapes", Comey testified, The Hill reported. Pressed on the issue, he insisted he wasn't "hinting anything", before adding: "Oh you're going to be very disappointed when you hear the answer, don't worry".
Comey's testimony added fuel to critics' accusations that Trump's actions around the Russian Federation probe might have amounted to obstruction of justice. "I took it as a direction".
Mr Trump also seized on Mr Comey's revelation that he had directed a friend to release memos documenting his conversations with the president to a reporter. Trump stopped short of saying that Comey lied under oath. This week, while the attention was on the Senate for the Comey hearing, Conaway and Schiff held a press conference to remind the public that they are pursuing an "aggressive" investigation into the Russia-related scandals.
But Comey did not provide any proverbial smoking gun.
Comey, who was sacked by Trump last month, said he did so in hopes that the memos, which documented what the former director felt was inappropriate contact by the president amid the ongoing investigation, would prompt the Justice Department to appoint a special counsel to take over the probe.