Biden fights a class war, not the culture war

Janan Ganesh: the Democrat stuck to his economic message in an ugly debate. "Swap Donald Trump for George HW Bush, and Mr Biden is resuming the unfinished business of 33 years ago. There is awesome pressure on the Democrat to engage with the cultural schisms of the day: over race, policing, free speech and what it means to be male or female." The Financial Times columnist shares his thoughts on Tuesday's controversial debate.