Former President Donald Trump referred to Jeff Sessions as “the first mentally r——- attorney general,” according to a new book by New York Times reporter Maggie Haberman.

Trump was angry with Sessions over his refusal to recuse himself from the Russia investigation that haunted Trump’s first term in office and for Sessions not being aggressive enough in using the attorney general’s office to go after the ex-president’s political enemies.

Trump said he should get credit for nominating Sessions, the U.S. senator from Alabama, as “the first mentally r——- attorney general,” Haberman wrote in “Confidence Man: The Making of Donald Trump and the Breaking of America,” according to Insider.

Aides to the former president would invoke Sessions’ name to deflect anger Trump had for them and have Trump go off on Sessions, according to Haberman’s book.

Sessions, who was the first sitting senator at the time to endorse the eventual president, resigned as attorney general at Trump’s request in November 2018.

He then went on to run for his old U.S. Senate seat, where his rivalry with Trump renewed when the former president endorsed eventual nominee and current U.S. Sen. Tommy Tuberville in the GOP primary.

Trump mocked Sessions’ second-place finish in the primary, tweeting: “This is what happens to someone who loyally gets appointed Attorney General of the United States & then doesn’t have the wisdom or courage to stare down & end the phony Russia Witch Hunt. Recuses himself on FIRST DAY in office, and the Mueller Scam begins!”

Haberman’s claims in the book are not the first time Trump has been alleged to have used an ableist slur to describe Sessions.

In “Fear: Trump in the White House,” the book penned by ex-Washington Post reporter Bob Woodward, the former Watergate reporter claimed Trump called his attorney general “mentally r——-” and a “dumb Southerner.”

Trump denied the allegations.