Over the past year, I have read through hundreds of books, scoured many more newspaper and magazine articles, and reviewed government records, campaign memos, and personal correspondence in assorted archives across the country to investigate how the Republican Party went bonkers. This has led to a book appropriately titled "American Psychosis: A Historical Investigation of How the Republican Party Went Crazy." It chronicles the 70-year relationship between the GOP and far-right fanaticism and recounts the party’s long-running effort to exploit and encourage extremism, bigotry, paranoia, and tribalism. The book examines and explains the party’s critical partnerships with extremists—from McCarthyism to the Birchers to the Southern strategy to the New Right to the religious right to Palinism (as in Sarah Palin) to the Tea Party to Donald Trump. It didn’t start with Trump. His alliance with kooks, racists, conspiracists, and other extremists is not an aberration; for decades the Party of Lincoln has relied on, egged on, and embraced the forces of hate, conspiracism, and racial bias to win elections.