Zohran Mamdani’s victory in the New York City Democratic mayoral primary is the outcome of a campaign that will be pored over, with elements replicated not just in America but anywhere left-wing politicians and movements are looking to break through. His surprise success vindicates the politics, message and strategies of Alexandria Ocasio-Cortez and Bernie Sanders, offering a blueprint for the Democratic Party on how to win. In a city seemingly allergic to progressive mayors, how did he do it? You can’t spell campaigns without Camps, an acronym I use when describing effective contemporary political campaigning. Camps stands for consistent, authentic,...