CNN  —  In the final two years of his presidency, Joe Biden had private moments where he could not recall the names of top aides, had an increasingly limited private schedule, was prone to incoherence and losing his train of thought, and was hidden from the public eye to shield the extent of his decline, according to a new book from CNN’s Jake Tapper and Axios’ Alex Thompson. The book details episode after episode where Democratic lawmakers, White House aides, members of Biden’s Cabinet and