The U.S. Justice Department, silent for months as President Donald Trump’s private lawyers have fought to block congressional subpoenas targeting financial information, was invited Monday to tell a Washington federal appeals court what it thinks about the litigation.

The U.S. Court of Appeals for the D.C. Circuit is weighing Trump’s challenge to a House Oversight Committee subpoena that was directed to his longtime accounting firm Mazars USA. A three-judge panel on Friday heard from the lawyers in the case for more than two hours, and at times the judges expressed some skepticism at the “stunning” arguments from an attorney for Trump who argued the presidency is largely immune from the broad investigative and oversight authority of Congress.