Michael Cohen is claiming President Donald Trump knew about and approved a meeting with a Russian lawyer connected to the Kremlin at Trump Tower in 2016, CNN is reporting.
CNN cited anonymous sources, saying Cohen was willing to share that information with special counsel Robert Mueller, who is investigating possible collusion between Mr Trump's campaign and Russian Federation.
In a tweet Friday morning, Trump wrote "I did NOT know of the meeting with my son, Don Jr".
At first, Trump Jr. said he never told his father of the meeting then later told Senate investigators that he couldn't recall who he spoke with that night.
After a week of revelations that suggest Michael Cohen may have turned on Donald Trump, Rudy Giuliani, the President's current lawyer, argued that Trump's former attorney wasn't credible and has "lied all his life".
After the reports indicating Cohen would say otherwise, Alan Futerfas, an attorney representing Trump Jr. told USA TODAY that "We are very confident of the accuracy and reliability of the information that has been provided by Mr. Trump, Jr., and on his behalf".
"He's been lying all week, or two weeks, he's been lying for years", Giuliani told CNN's Chris Cuomo shortly after the report was published.
Giuliani added in his Thursday interview that he didn't "see how he [Cohen] has any credibility", referring to Cohen's lawyer's releasing a tape earlier this week of what appeared to be a secretly recorded conversation between Cohen and Trump.
But Cohen has no paperwork, audio recordings or other hard evidence to back up his story, CNN also reported.
Noting that Cohen himself is under federal investigation, Trump tweeted at one point: "Sounds to me like someone is trying to make up stories in order to get himself out of an unrelated jam (Taxi cabs maybe?)".
Raddatz asked Abrams and Chris Christie, a former U.S. prosecutor and New Jersey governor who is an ABC News contributor, for their thoughts on the Trump team's legal strategy in regard to Cohen.
In response to Giuliani's claims this weekend that Cohen had violated the privilege, Cohen's attorney Lanny Davis issued a statement calling Giuliani "confused".
Mr Trump has always denied knowing about the meeting before it took place.
Giuliani previously told Business Insider he "would be surprised" if Trump knew about the meeting at the time that it happened. He clearly states that he anticipated he was going to receive damaging information on his father's political opponent Hillary Clinton.
"My observation is that it was an evolution that caused him to decide once Donald Trump was president that he had to tell truth and change his life", Davis told the AP.
Moreover, should Cohen choose to cooperate with investigators, including Mueller, it's not clear what information he has that they could not gather for themselves or have not already learned on their own. Jared Kushner and Paul Manafort were also present at the meeting. But he also left open the possibility that Trump might have known but later forgot about it. Those people denied that Trump had contemporaneous knowledge of the meeting on more than 15 occasions, according to CNN's analysis.
The person described Weisselberg as overseeing every dollar that went in and out of the Trump Organization - and as the individual who personally gave Trump updates on these matters.
"Robert Mueller and his gang of 13 Angry Democrats obviously can not find Collusion", Trump said during a new set of tweets, so "now they are looking at my Tweets (along with 53 million other people)".