The FBI raided Cohen's NY office and hotel room on Monday seeking, among a number of things, information regarding the role he may have had in attempting to suppress information about the alleged affairs.
As his lawyers went to court in NY on Friday to try to block prosecutors from reading files that were seized from the personal lawyer, Michael D. Cohen, this week, Mr. Trump found himself increasingly isolated in mounting a response.
Cohen has not been charged with a crime.
"Cohen has told at least one witness that he has only [one] client - President Trump", the lawyers wrote in court documents, challenging Cohen's claims that records seized in raids on his home and office Monday should be protected by attorney-client privilege.
Federal investigators confirmed on Friday that Cohen is indeed under criminal investigation.
Cohen, though, would often make light of his legal acumen, as a former Cooley Law School classmate, Greg Crockett explained. "They could get evidence from Michael Cohen about what happened on that call and could ask President Trump".
The uncertainty around what was taken has heightened the unease around Trump, whose lawyers had projected confidence in their dealings with the special counsel, Robert Mueller, but were caught flat-footed by the extraordinary raids on Cohen. Neither he nor his lawyer responded to requests for comment for this story.
Court filings unsealed Friday revealed that Cohen has been under grand jury investigation for months for alleged "criminal conduct" related primarily to his "personal business dealings".More news: The IG report on McCabe
Cohen is known to tape conversations with associates and store them, The Washington Post reported Thursday. The latter, has alleged that she had sex once in 2006 with Trump and was paid money shortly before the 2016 USA presidential election to keep quiet about it.
In addition to searching Cohen's office and hotel room, prosecutors also obtained warrants to seize material from his cellphones, tablet, laptop and a safe-deposit box, according to people briefed on the warrants.
At a hearing on Friday, U.S. District Judge Kimba Wood told an attorney for Michael Cohen that his client needed to be there to help answer questions about his law practice.
The raids followed a referral by US Special Counsel Robert Mueller, who for almost a year has been looking into whether Trump's presidential campaign colluded with Russian Federation. The source pointed out that the only two people who know if there is anything there are the President and Cohen.
Cohen's lawyers will need to turn over the requested material by 10 a.m. Monday, and court will reconvene at 2 p.m. -with Cohen himself seated at the counsel's table.
"As a privilege holder, he [Trump] has an acute interest in those proceedings and the manner in which these materials are reviewed", Hendon said, asking Judge Kimba Wood at the US District Court for the Southern District of NY to postpone the hearing until next Monday.
Wood adjourned the hearing until Monday to give lawyers for Trump an opportunity to weigh in on the issue.