South Dakota's first gubernatorial primary runoff pitted incumbent Larry Rhoden against outsider Toby Doeden after neither cleared the 35% threshold to win outright.
https://www.foxnews.com/politics/gop-governor-survives-challenge-from-bitcoin-evangelist-gubernatorial-runoff
https://www.foxnews.com/politics/gop-governor-survives-challenge-from-bitcoin-evangelist-gubernatorial-runoff