President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE mocked Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE’s Southern accent and called him “mentally retarded” in a conversation with a White House aide recounted in Bob Woodward's new book, which was obtained by The Washington Post on Tuesday.

Trump lashed out at Sessions, who he has repeatedly criticized for recusing himself from the Russian investigation, while speaking with then-White House staff secretary Rob Porter.

“This guy is mentally retarded. He’s this dumb Southerner,” Trump reportedly told Porter while using a Southern accent. “He couldn’t even be a one-person country lawyer down in Alabama.”

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The president reportedly Sessions a “traitor” for not overseeing special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE’s investigation into Russian interference in the 2016 election.

The Hill has reached out to the White House and the Justice Department for comment.

Woodward, a veteran journalist known for his reporting on the Nixon-era Watergate scandal as well as a series of tell-all books on past administrations led by presidents of both parties, is releasing his new book on Sept. 11.

“Fear: Trump in the White House” reportedly offers a detailed account of the inner workings of the Trump administration.

Woodward’s account is based on “hundreds of hours of interviews with firsthand sources, meeting notes, personal diaries, files and documents.”

The book's release date comes less than two months before the midterm elections.