By Adam Hawksbee The dynamics of mayoral races are very different to Westminster election mud-slinging, and mayors Andy Street, Ben Houchen and Sadiq Khan could all buck the national trend, writes Adam Hawksbee Ed Koch, the New York Mayor who steered his city away from ruin in the 1980s, had a simple way of connecting with voters. “How am I doing?” he asked passers-by on street corners, at subway stations, outside bars and bodegas. He took what he heard straight to City Hall, acting on what mattered most to the public, and ultimately served three full terms. Mayors Andy Street and Ben Houchen,…