The 2024 primary may very well resemble a 1993 congressional race between former Republican congressmen Bob McEwen and Rob Portman. McEwen won four of the five counties in the district – Adams, Brown, Clermont and Warren. In Adams, once part of his district, he received 77 percent of the vote, 67 points ahead of Portman. Portman won only Hamilton County, but by a large enough margin to win the primary with 17,531 votes.