President Donald Trump on Wednesday blasted former White House adviser Steve Bannon as having "lost his mind" in the fallout over damaging comments Bannon made about Trump's son, Donald Trump Jr., in excerpts of a new book.

Trump, who had continued to speak privately with Bannon in the months after firing him as the White House chief strategist last August, essentially cut ties with Bannon in a blistering statement issued after Bannon's comments about Don Jr. came to light.

"Steve Bannon has nothing to do with me or my presidency. When he was fired, he not only lost his job, he lost his mind," Trump said.