You cannot take public office without swearing you have never fought a duel.

The Law Explained

The Kentucky state constitution still requires all public officials, and even licensed attorneys, to take an oath stating they have not participated in a duel with deadly weapons. Implemented in 1850, the clause was designed to put an end to the rampant, bloody culture of political dueling. Though dueling is entirely obsolete, modern politicians and lawyers today still solemnly swear they haven't challenged anyone to a pistol fight.