When George Galloway roared to victory in the Rochdale byelection in February, his win was dismissed by many as an anomaly. And in many important respects, it was. Galloway is a uniquely charismatic politician. Labour’s campaign had imploded in an antisemitism row. And one issue above all loomed over the battle for the Pennines town: Gaza. Yet if commentators, pollsters and senior Labour figures had convinced themselves that Rochdale was a one-off, the results of the 2024 general election show how wrong they were. Labour’s Jonathan Ashworth is the most high-profile victim so far of this complacency. The Leicester South...