Historian and author Michael Dobbs reconstructs how the scandal gradually engulfed more administration officials, with operatives turning on each other — and eventually the president. We'll talk about what led to Nixon's downfall and why there are more tapes of Nixon than of any other president. Dobbs' book is 'King Richard.' Also, TV critic David Bianculli shares his thoughts on Conan O'Brien's farewell to his late night show, as he moves to HBO Max for a variety show.