There’s always been a symbiosis between Donald Trump and right-wing rhetoric. His 2016 campaign for the Republican presidential nomination was successful — surprisingly successful — because of his willingness to embrace arguments and assertions that were considered beyond the pale for his more traditional opponents. By picking out and then defending (to whatever extent was necessary for his audience) claims about immigrants and terrorism, among other things, he tapped into a strain of argumentation that was often kept out of sight. He helped bring the rhetoric into the mainstream.