"Pomerantz, who investigated Trump at the Manhattan District Attorney’s Office, said he was appearing before the committee “as required” because “I respect the rule of law,” before issuing a sharp rebuke of the panel’s probe and disclosing his intent to plead the Fifth.
“What I do not respect is the use of the Committee’s subpoena power to compel me to participate in an act of political theater,” Pomerantz’s statement reads. “This deposition is for show. I do not believe for a moment that I am here to assist a genuine effort to enact legislation or conduct legislative ‘oversight.’”
“Fortunately, I do not have to cooperate with the cynical histrionics that this deposition represents,” it later adds. “Although the rule of law compels me to be here, it does not require that I play a substantive role in your theatrical production. Under the law, I can decline to answer your questions for several reasons.”"
In context, he answered no questions. He clearly felt the inquiry was a farce and did not want to participate. Skeletor asked why the Republicans didn't do anything about it. I suspect the answer is, they would rather leave that cow patty undisturbed. They know he was right.