Former Attorney General William Barr says President Donald Trump’s conduct as a violent mob of his supporters stormed the U.S. Capitol was a “betrayal of his office and supporters.”

Barr said Thursday that “orchestrating a mob to pressure Congress is inexcusable” in a statement obtained by NBC News. The Associated Press was the first to report Barr’s remarks.

Barr was one of Trump’s most loyal and ardent defenders in the Cabinet.