Watergate remains the gold standard for political scandals, said Ken Hughes, a historian with the Miller Center’s Presidential Recording Program at the University of Virginia and author of “Chasing Shadows.” Those who knew the president well agreed in recent interviews that Watergate changed the way Americans looked at politics and the presidency.... “Nixon was crying, not just because he appreciated Haldeman’s and Ehrlichman’s loyalty,” said Larry Sabato, director of the Center for Politics at the University of Virginia. “He was crying because h...