Men with long beards and Christian values center the most geographically divisive show in the data set. “Duck Dynasty,” a reality show on A&E, follows the over-the-top lives of a Louisiana family that makes the Duck Commander duck call.

It is the prototypical example of a show that is most popular in rural areas. The correlation between fandom and the percentage of people who voted for Mr. Trump was higher for “Duck Dynasty” than it was for any other show.