The lawyers who represent the whistleblower who first came forward with allegations about President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE's contacts with Ukraine are arguing that the identity of their client is no longer relevant now that more information about the complaint has publicly come to light.

Lawyers Andrew Bakaj and Mark Zaid wrote in an op-ed published Friday in The Washington Post that witnesses interviewed by House Democrats have "substantiated" the whistleblower complaint that raised concerns about Trump pressing Ukrainian President Volodymyr Zelensky to open an investigation into one of his top 2020 political rivals, former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE.

ADVERTISEMENT

Their op-ed comes, they write, amid increased speculation over the whistleblower's identity, particularly as the president and his supporters seek to "fanatically" reveal their client's identity.

"Much of what has been disclosed since the release of our client’s complaint actually exceeds the whistleblower’s knowledge of what transpired at the time the complaint was submitted," the lawyers write.

In particular, they point to the transcript of the Trump-Zelensky July phone call that the White House released and text messages between three U.S. diplomats related to discussions of the investigations and a potential quid pro quo, as well as from "congressional testimony by people intimately involved with the circumstances the whistleblower first raised concern about."

"Because our client has no additional information about the president’s call, there is no justification for exposing their identity and all the risks that would follow," they continue.

The lawyers noted that the intelligence community inspector general found that the whistleblower not only followed the proper procedures in filing a complaint, but that their complaint was both “urgent” and “credible.”

The two lawyers said despite the new information about Trump's contacts with Zelensky, the president has continued to attack the whistleblower and look to reveal the individual's identity.

They also voiced concern that the president's defenders are aiding in those attacks.

"The reckless attacks on our client are particularly disturbing because they undermine an already frail system meant to protect honorable whistleblowers who lawfully disclose a reasonable belief that there has been a violation of law, rule or regulation, or an abuse of authority," they wrote.

"Exposing the identity of the whistleblower and attacking our client would do nothing to undercut the validity of the complaint’s allegations."