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.

His comments come a day after angry and armed protesters broke into the U.S. Capitol, forcing Congress members to halt the ongoing vote to certify President-elect Joe Biden’s election and then flee from the House and Senate chambers.

Barr resigned last month amid lingering tension over the president’s baseless claims of election fraud and the investigation into Biden’s son.

Barr said there was no widespread fraud in the election, defying Trump, who has made baseless claims the basis of a failed legal bid to overturn the results and stay in power.

His resignation was "on his own accord" and "wasn't pushed out or forced to resign," a White House official said at the time. Trump tweeted of his departure, "Our relationship has been a very good one, he has done an outstanding job! As per letter, Bill will be leaving just before Christmas to spend the holidays with his family."