When theNew Yorkerstaff writerAndrew Marantzfirst heard that the Conservative Political Action Conference, the flagship event of the American conservative movement, was being held in Hungary, he thought it might be a joke. “A lot of people have worried for a few years now that the Republican Party is becoming more ambivalent about certain bedrock norms of American democracy,” Marantz told David Remnick. “To openly state, ‘We’re going to this semi-authoritarian country’ . . . I thought it was maybe a troll.” But C.P.A.C. Hungary was very real, and the event demonstrated an increasingly close relationship between American conservatives and authoritarians abroad. Viktor Orbán wins elections and claims a democratic mandate, but his legislative maneuvers and rewrites to the constitution have rendered political opposition increasingly powerless. Marantz finds the admiration for him by many in America unsettling. “I couldn’t really imagine a Putin-style takeover” of power in Ame...