The election of Donald Trump in 2016 didn’t just shock the country, it jolted the Republican Party and forced an overdue reckoning between rank-and-file Republicans and party leadership. Long-held beliefs promoted by the Republican Party establishment were smashed in real time as Republican voters, and millions of Obama voters especially in the Midwest, rejected the bi-party consensus on illegal immigration, international trade pacts, and losing foreign wars. The GOP—and the conservative...