Comey "needs to come back before the Congress", Schiff said, and "share with the public what conversations he had with the president" - including whether Trump tried to obstruct the investigation in any way.
On the Senate floor, Minority Leader Chuck Schumer (D-N.Y.), who had spoken earlier on reports that Trump disclosed highly classified information to Russian officials in the Oval Office, declared that "on a day when we thought things couldn't get any worse, they have".
The memo, which a Comey associate read to Times reporters, is the most concrete evidence to date that Trump attempted to influence the FBI's investigation into the Trump campaign's ties to Russian Federation, which us intelligence agencies say attempted to influence the 2016 presidential election in Trump's favor.
The Republican chairman of the House oversight committee says he will seek copies of any memos that Comey wrote about his meetings with Trump.
MATT APUZZO, The New York Times: Well, the significance of the memo, of course, is just not - you know, just last week, the president fired Jim Comey, the Federal Bureau of Investigation director, and the stories kept changing.
President Donald Trump's interview last Thursday with NBC's Lester Holt seems so long ago at this point.
President Trump told then-FBI Director James Comey that he should consider jailing journalists over the leak of classified information, The New York Times reported Tuesday.
Sen. Lindsey Graham, R-S.C., emphatically said he's not commenting on news stories anymore.
And while Comey himself has been silent, his associates have been exposing intriguing details of his encounters with Trump.
Republicans and Democrats demanded answers from Comey.
"This is on him", meaning Trump, a top Republican close to the White House said, after speaking with dejected advisers inside the West Wing.
The Times revealed that, among miscellaneous memos Comey left behind after his unceremonious sacking last week, was a note about a conversation he had with the president a day after Flynn's abdication in February.
As described by the Times, the memo indicts James Comey more than it does President Trump, in my opinion.
The White House has repeatedly crossed lines that other administrations have been reluctant to cross when discussing politically charged criminal investigations.
The Arizona Republican says, "We've seen this movie before".
The White House denies everything, but Comey's associate went on to tell the Times that Comey created records of all interactions with the President which made him uncomfortable about the potential for wrongdoing.
Soon after the firing, a Comey associate told the AP that Comey recounted being asked by Trump at a January dinner if he would pledge his loyalty. Comey's memos, created nearly immediately after he had his conversations with the President, could also be admissible in court - should it come to that.
The Trump administration was already under fire before reports of the president's attempts to end the FBI's investigation emerged.
Acting FBI Director Andrew McCabe told Congress last week that "there has been no effort to impede our investigation to date".
Why has Trump been going to such lengths to stop this investigation?
"Three words: obstruction of justice", said CNN's senior legal analyst Jeffrey Toobin on Tuesday.
The White House strongly disputed the claims late Wednesday.
The White House has denied the report in a statement.
Press Secretary Sean Spicer and U.S. national security adviser H.R. McMaster had appeared before reporters, defending Trump's decision to share sensitive information about Islamic State operations in the Middle East with Russian officials last week, a day after he fired Comey.
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