Flynn also admitted to making false statements about unregistered foreign agent work he performed for the benefit of the Turkish government. Both of those matters had been previously referenced in the court filings and hearings for Flynn's plea previous year.
"Given the defendant's substantial assistance and other considerations set forth below, a sentence at the low end of the guideline range-including a sentence that does not impose a term of incarceration-is appropriate and warranted", the memo reads.
Mueller has said he will reveal how Manafort repeatedly lied to federal prosecutors and agents "on a variety of subject matters".
After railing against Cohen, his close associate for more than a decade, Mr Trump congratulated Roger Stone, a political operative involved in his campaign, for saying that he would refuse to testify to the Russian Federation investigation led by Robert Mueller.
Cohen pleaded guilty to eight criminal charges, including tax fraud and campaign finance violations, but still faces 46-62 months in prison, his plea deal notwithstanding. CNN's Manu Raju observed that Trump is offering a "big signal here" that he could pardon Stone and is "encouraging him not to cooperate".
Robert Mueller said Cohen had cooperated
Cohen admitted he lied to congress when he said efforts to pursue a Moscow real estate ended in January 2016 when they actually continued until June 2016, after Trump had clinched the Republican presidential nomination.
Last week, Corsi refused Mueller's offer for a plea deal over his role as a suspected intermediary between Stone and WikiLeaks, saying he was prepared to spend the "rest of my life" in prison rather than "sign a lie".
In this image made from a video taken on December 10, 2015 and made available on Tuesday, Feb. 14, 2017, US President Donald Trump's former National Security Advisor Michael Flynn, right, shakes hands with Russian President Vladimir Putin, in Moscow.
Papadopoulos is now serving a 14-day sentence after a judge denied his 11th-hour appeal to delay a prison sentence. This suggests that the investigation may not be wrapping up soon.
Commenting on an investigation is not in and of itself a crime, but a Monday morning tweet by President Trump has some legal experts wondering if it crosses a line into witness tampering. "The fact it's done out in the open is no defence", said Neal Katyal, a veteran constitutional lawyer and former acting solicitor general of the Department of Justice.