OOCTOBER 23 Kamala Harris said she considers Donald Trump a fascist. John Kelly, Trump’s former chief of staff, recently said his old boss “falls under the common definition of fascist.” Mark Milley, a retired general who led the Joint Chiefs of Staff under Trump, is quoted in a new book calling Trump “fascist to the core.” All this has revived a debate that started during Trump’s 2016 election campaign: is he a fascist? What does the term mean, and does its application to Mr. Trump help explain the dangers he poses?