MY USA TODAY COLUMN: Donald Trump is a symptom of a new kind of class warfare raging at home and abroad. “To understand events around the world today, one must think in terms of the class struggle. This sentence sounds like something that could be written by a doctrinaire Marxist. But it is nonetheless true. Much of the current tension in America and in many other democracies is in fact a product of a class struggle. It’s not the kind of class struggle that Karl Marx wrote about, with workers and peasants facing off against rapacious capitalists, but it is a case of today’s ruling class facing disaffection from its working class.”