House Intelligence Committee Chair Adam Schiff said today's ruling in former White House counsel Don McGahn's case is "a very significant victory for congressional oversight, and for the American people."

He also reiterated tonight that it will be up to the witnesses who defied the committee's demands to change course if they want to testify in impeachment inquiry.

“The witnesses who have defied Congress at the behest of the President will have to decide whether their duty is to the country, or to a President who believes that he is above the law.”

Schiff's statement comes after a federal judge ruled today that McGahn must testify to the House of Representatives in its impeachment probe.

The Justice Department plans to appeal the ruling in the McGahn case, a department spokesperson said. An attorney for McGahn said the former White House counsel would testify, unless the case is paused for appeals.