Fun Kentucky factoid: The oath of office for governor specifically mentions dueling.

I do solemnly swear that I will support the Constitution of the United States and the Constitution of this Commonwealth, and be faithful and true to the Commonwealth of Kentucky so long as I continue to be a citizen thereof, and that I will faithfully execute, to the best of my ability, the office of Governor according to law; and I do further solemnly swear that since the adoption of the present Constitution, I, being a citizen of this state, have not fought a duel with deadly weapons within this state, nor out of it, nor have I sent or accepted a challenge to fight a duel with deadly weapons, nor have I acted as second in carrying a challenge, nor aided or assisted any person thus offending, so help me God.”[46]

wiki: governor of Kentucky