The White House chief of staff in the first two years of the Biden administration who returned to help Joe Biden prepare for his disastrous 2024 debate with Donald Trump said the former president was “out of it” and worried that Biden thought he was “president of NATO.”

In “Uncharted: How Trump Beat Biden, Harris, and the Odds in the Wildest Campaign in History,” set for release April 8, author Chris Whipple wrote that Ron Klain, the White House chief of staff from 2021-23, was “startled” when he arrived at Camp David to help with debate preparation, the New York Post reported Wednesday.

“He’d never seen him so exhausted and out of it,” Whipple wrote, adding Klain was alarmed by Biden’s behavior before the debate.

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