David Broockman is a political scientist at UC Berkeley who digs into one of democracy’s core questions: can political messages really change minds? He’s spent his career running careful studies of persuasion, from door-to-door conversations to the effects of cable news, and testing whether the confident claims of political consultants actually hold up. In our conversation, David shares the path that brought him into political science and the “credibility revolution” that reshaped how researc...