Cohen's attorneys Lanny Davis and Michael Monico told lawmakers that Cohen has discovered substantial files on a hard drive that might be helpful to investigators.
Cohen said he recently accessed a hard drive that he claims contains 14 million files, including emails, voice recordings and attachments from Cohen's computers and phones.
"It is our hope ... that the Southern District of NY recognizes the need for Mr. Cohen to be readily available to Congress and to prosecutors conducting these investigations, such that his date to report for incarceration about four weeks from now will be substantially postponed while he is fully cooperating with prosecutors and Congress". Cohen's lawyers wrote in the letter, obtained by CNN, that they hoped he would receive a reduced term, and that the May 6 date he is scheduled to report to prison "will be substantially postponed while he is fully cooperating with prosecutors and Congress".
"It is our hope that the authorities in the Southern District of NY will consider this total picture of cooperation. and the particular facts involved here to grant Mr. Cohen a reduced term", Davis wrote.
"Michael Cohen's recent public and closed-door testimony to Congressional committees has triggered additional areas for investigation by law enforcement authorities and the Congress".
"However, with 30 days left before he surrenders to prison, time is no longer a luxury he is capable of", Cohen's lawyers added.
Cohen's attorneys also laid out their argument to lawmakers about why they believed his sentence was "disproportionate", given the fact that some of his crimes, such as the campaign finance violations, were at the behest of then-candidate Trump to make a hush-money payment to adult film star Stormy Daniels for an alleged extra-marital affair with Trump years prior.
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It's not clear which committees received letters from Cohen, or what they plan to do in response.
The letter was sent to a veritable who's-who of Trump opponents, including Reps.
Cohen has testified publicly before the House Oversight and Reform Committee and privately before the House and Senate Intelligence Committees.
Republicans on several of the committees where Cohen testified have accused the President's former personal lawyer of lying when he appeared, including Cohen's statements that he never requested a pardon from Trump and that he did not want a job in the White House. Working alone, Mr. Cohen has only had the time to go through less than | percent of the drive, or approximately 3,500 files.
Cohen told a judge that he lied to Congress about the Moscow project so his testimony would match Trump's public claims that he had no business with Russian Federation during the campaign.
Heavily redacted records show FBI was investigating President Trump's former attorney before raid; chief intelligence correspondent Catherine Herridge reports.
In a six-page letter, Ohio Rep Representative Jim Jordan and North Carolina Rep. Mark Meadows wrote to Attorney General William Barr that Cohen 'committed perjury and knowingly made false statements during his testimony'. Ever since, Cohen has been attempting to offer additional information to NY prosecutors, in a bid to persuade them to ask the judge to reduce his sentence.