A farmer, an auto dealer sales consultant and a business owner are challenging the incumbent Republican county commissioners in the May 16 primary.

Joseph Peter King, a self-employed farmer from Valencia; Zachary Scherer, of Chicora, a sales consultant at Mike Kelly Automotive in Penn Township; and Ryan Covert of Chicora, a business owner and Republican Committee member, recently field their nomination petitions with the county bureau of elections.

Those three Republicans are challenging Republican incumbents Leslie Osche and Kim Geyer for party nominations in the primary.

No Democratic candidates have filed to challenge Democratic Commissioner Kevin Boozel. The deadline to file nomination petitions was March 7.