 Brown had been running for re-election in a district that covers all of Cerro Gordo, Mitchell, and Worth counties and a small part of Floyd County. Doug Campbell, a former Mason City school board member, finished about five points behind Brown in the June primary. Campbell made opposition to the carbon pipeline project a main issue in the primary campaign. Radio Iowa, I'm O.K. Henderson. Under state law, Republicans in Brown's state Senate district may hold a convention and nominate someone to run for the seat. In other news...