Detailing one-on-one talks with a sitting president - which under normal circumstances are private - Comey said he took painstaking notes for fear Trump might "lie" about the unusual encounters.
Asked on Friday if he would be willing to go under oath to give his version of his interactions with Comey, Trump replied, "100 percent".
Richman has been in touch with Senate judiciary through special counsel Bob Mueller's office, and that there will be movement after the weekend, a source was quoted as saying.
During special coverage of Comey's testimony from 10 a.m. -1 p.m. ET, Fox News finished first in total viewers with 3.1 million but was third in the key adults 25-54 demographic with 600,000 viewers.
In fact, there have been several cases showing it is possible to obstruct justice using those words.
Trump and his personal lawyer have strongly denied much of Comey's claims, with the president disputing Friday that he had asked for loyalty from the FBI director and asked him to lay off the Flynn investigation.
Prodigy, half of rap duo Mobb Deep, dead at 42
West Coast rivalry of the era and were dissed by Tupac on several tracks - some of which mocked Prodigy's sickle-cell anemia. Two of their albums - The Infamous (1995) and Hell on Earth (1996) - are considered critical and financial successes.
Trump abruptly fired Comey as director of the Federal Bureau of Investigation on May 9, admitting later that the Russian Federation probe was on his mind at the time.
On Thursday, Comey told lawmakers that he made a decision to tip the media off about Trump's "let this go" comment only after Trump tweeted about the possibility of a recording device inside the Oval Office. Comey's testimony added fuel to critics' accusations that Trump's actions around the Russian Federation probe might have amounted to obstruction of justice. On the "Today" show, former campaign aide Corey Lewandowski stated that Comey was part of the intelligence "deep state" out to undermine Trump.
Comey admitted that, after his firing by Trump on May 9, he asked a friend to leak the documentation of the contents of the Trump meetings to the press in the hope of prompting the appointment of a special prosecutor. Reps. Michael Conaway, R-Texas, and Adam Schiff, D-Calif., quickly announced they had written to Donald McGahn, the White House counsel, requesting that any recordings or memos about Trump's conversations with Comey be furnished to the intelligence committee within two weeks.
Then came the February 14 meeting, which was the day after Trump fired Michael Flynn, his tainted pick for national security adviser.
As perhaps should have been expected, the most important takeaway from Comey's testimony may be what he didn't say.
Finally, Comey charges that Trump told an untruth about him and the Federal Bureau of Investigation. "Middle East, a big problem", Trump said. Wednesday's hearing prompted a number of questions that were answered with "I can't respond in an open session".
But the president's decision to weigh in personally represented a sharp shift in strategy for the White House and could come with political risk for Trump, who has potentially undermined himself legally on other matters through his tweets, including his attempt to impose a "travel ban" on immigrants from some majority-Muslim countries. "If he did it this time, how many other times did they do it?"