The former defense secretary has publicly denounced President Trump, labeling him as “the most divisive president in my lifetime,” in a scathing attack on his former boss.

Gen. James Mattis referred to the president’s plan to use the military if necessary to reduce the nationwide violence and rioting over the death of George Floyd, and his comments have drawn the ire of many, including retired Marine Corps judge advocate and former attorney to the president, John M. Dowd, reported The Daily Caller.

President Trump tweeted a copy of a letter from Dowd, his former lawyer who represented him during the Russian collusion investigation, criticizing Mattis for his denouncement of the president.

Mattis penned on Wednesday, June 3, “We are witnessing the consequences of three years without mature leadership. We can unite without him, drawing on the strengths inherent in our civil society. This will not be easy, as the past few days have shown, but we owe it to our fellow citizens; to past generations that bled to defend our promise; and to our children.”

President Trump retweeted Dowd’s reply to Mattis’ comments, asking readers to take a look.

“I slept on your statement and woke up appalled and upset,” Dowd’s letter began. “You lost me. Never dreamed you would let a bunch of hack politicians use your good name and reputation—earned with the blood and guts of young Marines.”

“President Trump has done more to help our minority brothers and sisters in three years than anyone in the last 50. Ask the black pastors. Ask the leaders of the black colleges and universities. He got them funded. Ask them about the prison reform, which ended the draconian sentences imposed on young black men by the laws enacted by Biden and his hacks. You need to bone up on your homework and stop listening to Uncle Leon,” Dowd continued.

Dowd referred to the protesters in Lafayette Park as “phony” and “terrorists using idle hate-filled students to burn and destroy.”

After then criticizing Mattis for remaining silent over the “ugly, hate-filled, disgraceful” remarks House Speaker Nancy Pelosi  (D-Calif.) and Senate Minority Leader Chuck Schumer (D-N.Y.) had made about the president, Dowd questioned Mattis on his own failures. Was his anger “borne of embarrassment” as a result of his own mistakes?

On Wednesday, the president said he doesn’t think it will be necessary to utilize the military.

“It depends. I don’t think we’ll have to. We have very strong powers to do it. The National Guard is customary, and we have a very powerful National Guard,” Trump told Sean Spicer, his former press secretary, in an interview on Newsmax.

“As far as going beyond that? Sure, if it was necessary,” Trump added. “We have antifa. We have anarchists. We have terrorists, looters. We have a lot of bad people in those groups.”

White House deputy press secretary Hogan Gidley described Mattis as out of touch and unaware of the “massive” rioting taking place across the country, during an interview with Fox News.

“It’s obvious that the general doesn’t have a clue what’s going on in the American cities out there, or he’s actually, worse, turned a blind eye to it,” Gidley said. “The president is solely focused on uniting this country and actually bringing back safety and security in our American cities.”