Bernie Sanders has a good chance to win three states on Saturday and then set the scene for a revolutionary contest between himself and rival Hillary Clinton. The States of Washington, Alaska and Hawaii will vote on Saturday for their Democratic presidential nominee. Sanders and Clinton both relish the fact of going against a Republican businessman, turned professional politician, and the front-runner for the White House, Donald Trump. There are no Republican contests on Saturday so children can stay up late and watch telly. New York Times reports: Washington, the largest prize of the day with 101 delegates in play, and Alaska, with 16 delegates, are holding caucuses, essentially local voting meetings, the kind of contests where Mr. Sanders has done well. Both states also have relatively low percentages of black and Hispanic voters, two groups that have favored Hillary Clinton this year. Hawaii Democrats are awarding 25 delegates based on a “presidential preference poll,” a hybrid event in which voters show up at a scheduled meeting, like a caucus, but vote by secret ballot, like a primary. Republicans are not holding any contests today. The next nominating battle for both parties will be the April 5 primaries in Wisconsin. Mr. Sanders [...]