This piece has been adapted from "American Psychosis: A Historical Investigation of How the Republican Party Went Crazy,” by David Corn. Nelson Rockefeller stared into a sea of hate. Standing at the podium of the Republican National Convention of 1964, the 56-year-old patrician politician who symbolized dynastic American power and wealth was enveloped by waves of anger emanating from the party faithful. Delegates and activists assembled in the Cow Palace on the outskirts of San Francisco hurled boos and catcalls at the New York governor. He was the enemy. His crime: representing the liberal Republican establishment that, to the horror...