Luis Lopez used to be a big fan of Los Angeles Mayor Eric Garcetti. Lopez, who owns an auto repair shop, gave $100 to Garcetti's 2013 campaign for mayor. He spread the word about Garcetti on the Facebook page of the local Chamber of Commerce, where he serves as executive director. Now, as the mayor fires up his bid for reelection, that enthusiasm is gone. Lopez doesn't like Garcetti's minimum wage proposal, or the way it was unveiled. He described Garcetti staffers as largely unresponsive on the topic and says he won't vote for him in 2017. "The way he...