Donald Trump vented fury at protesters outside the White House in 2020, saying "Can't you just shoot them?" according to then defense secretary Mark Esper in book excerpts released Monday.
Esper wrote that he sat in the Oval Office with "the president red faced and complaining loudly about the protests under way in Washington" over the police killing of a Black man.
"Can't you just shoot them? Just shoot them in the legs or something?" Trump is quoted as saying in a preview of Esper's memoir seen by the Axios news website.
The protests, which were marked by violence as protesters clashed with security forces, were part of a nationwide wave of demonstrations in the wake of the May 2020 killing of George Floyd by Minneapolis police.
Esper's account appeared to confirm previous reports of Trump arguing that the military should intervene to quell the spiraling civil unrest.
An earlier book by journalist Michael Bender quoted sources saying the chairman of the Joint Chiefs of Staff, General Mark Milley, argued with Trump against using the military as the president demanded a stronger response.
Bender had quoted Trump as saying "shoot them in the leg -- or maybe the foot... but be hard on them!"
US Park Police and National Guard troops deployed tear gas and flash bangs to clear protesters outside the White House.
Esper publicly stated at the time that he opposed invoking the Insurrection Act, a rarely-used 200-year-old law which permits troops to be actively deployed within the United States.
His stance reportedly enraged Trump, and he was sacked in November 2020.
Axios said Esper's book, which will be released on May 10, had been vetted by the Pentagon and reviewed by generals and cabinet members.
It quotes Esper describing a "surreal" atmosphere in Trump's inner circle, with the idea of troops opening fire on Americans "weighing heavily in the air."
"I had to figure out a way to walk Trump back without creating the mess I was trying to avoid," he wrote in the memoir called "A Sacred Oath."