Last October, in the home stretch of the US presidential campaign, Donald Trump told supporters at a rally in Atlanta that he was “not a Nazi”. He was reacting to comments by his former chief of staff, John Kelly, who said in an interview that during his first term in office, Trump more than once suggested that Nazi leader Adolf Hitler “did some good things”. Kelly said that after consulting a dictionary he concluded that Trump “certainly” met the definition of a fascist. Since the start of Trump’s second term as US president, comparisons between his administration and the Nazi...