What polling data best indicates whether someone will support Donald Trump? It's whether they skew authoritarian on a set of questions pollsters ask about child-rearing. (Hint: If you'd rather have an obedient, well-mannered child than a curious, independent one — you're skewing authoritarian, as some 18 to 30 percent of Americans do.) Career political consultant Matt MacWilliams talks about his research, for a mid-career PhD, on the political impact of authoritarian impulses, especially in the face of threat, and what it might mean for America's future.