The New York attorney general’s dark-side personal life was an open secret in Democratic Party circles. New York State attorney general Eric Schneiderman has resigned, just hours after it was reported that he had been accused of violent assaults on women he had dated. These allegations, which include threats that Schneiderman made to stalk and kill the women if they told on him, came as a shock—except to anyone who has followed his career in politics. Schneiderman’s louche ethics have been well known. You didn’t need an “in” at Albany watering holes; just reading the newspapers would have told you...