Verizon said Tuesday that it will implement new safeguards to ensure top-level review before complying with subpoenas that target members of Congress after acknowledging it had secretly provided the call records of Republican lawmakers to the Justice Department as part of the sprawling Arctic Frost investigation that served as the foundation for the federal indictment of President Donald Trump.

“In 2023 Verizon was ordered to turn over call records for certain members of Congress to the Department of Justice. The Special Counsel and DOJ at the time decided who to target,” Verizon spokesman Kevin Israel told the Washington Examiner, referring to former special counsel Jack Smith and the Biden administration. “A court ordered Verizon not to tell anyone about that. We had no choice but to comply with the court order. So we did.”