This piece has been adapted from "American Psychosis: A Historical Investigation of How the Republican Party Went Crazy,” by David Corn. Some reporters feared Goldwater supporters were about to storm the stage and physically attack the governor. The Republican Party — those then in control of it — thought otherwise. They were guided by what Trump adviser Kellyanne Conway once called “alternative facts.” For many of the Capitol Hill assailants, Trump and his paranoia had become a theology. Excerpted from "American Psychosis: A Historical Investigation of How the Republican Party Went Crazy."

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