The door and its colorful display belong to the office of Nate Persily, the James B. McClatchy Professor of Law. And if you haven’t already guessed, elections are his thing.

As are election maps. In addition to being a prolific legal scholar in the law of democracy, he has also served as either a special master or court-appointed expert to craft congressional or legislative districting plans for Georgia, Maryland, Connecticut, New Hampshire, New York, North Carolina, and Pennsylvania.