Even the Washington Post acknowledges in its Fact Checker column that Adam Schiff’s claim that Trump’s whistleblower has a “statutory right” to remain anonymous is bogus.

From the 2018 transcript of a Justice Department video on “Whistleblower Rights and Protections”:

We would only disclose the whistleblower’s identity if it’s unavoidable during the course of the investigation. For instance, if a case went to litigation, we might be required by the court to disclose a whistleblower’s identity. 

James Freeman, in the WSJ, weighs in:

Mr. Schiff asks us to believe that civil cases sometimes reveal a whistleblower’s identity but the potential removal of the duly-elected President of the United States isn’t important enough to require such disclosure.

… there are few things in government more consequential than the removal of a President. Prosecuted for his alleged political motivations in the conduct of foreign policy, Mr. Trump deserves the right to explore the potential political motivations of his accuser.

Read more here.