articleFormer White House chief of staff Ron Klain revealed that President Joe Biden was "fatigued, befuddled and disengaged" before his debate with President Donald Trump in June, according to a new book. "The president was fatigued, befuddled, and disengaged," Whipple wrote, according to the excerpt. Klain, according to Whipple, said the president was irritable as he pushed back on the former chief of staff's suggestions. "25 minutes into the second mock debate, the president was done for the day. CNN's Jake Tapper and Axios' Alex Thompson are also releasing a book titled, "Original Sin: President Biden’s Decline, Its Cover-Up, and His Disastrous Choice to Run Again," in May.