Mayoral candidate Toni Preckwinkle backed a push to raise the minimum wage in Chicago to $15 by 2021, winning applause from some of her union supporters. Amara Enyia will start the home stretch of the campaign flush with cash thanks to a massive donation from Chance The Rapper. Susana Mendoza rolled out a new Spanish-language ad, and a new union endorsement, while Ald. Matt O’Shea (19) backed lifelong friend Jerry Joyce in the mayor’s contest.