Democrat Sarah Lloyd will take on Republican U.S. Rep. Glenn Grothman in his first re-election bid.
Lloyd beat Michael Slattery in Tuesday's primary in the 6th District, in east-central Wisconsin.
Lloyd, of Wisconsin Dells, served two terms on the Columbia County board of supervisors from 2004 to 2007 and on the Wisconsin Milk Marketing Board from 2008 to 2014. She works for the Wisconsin Farmers Union and the Wisconsin Food Hub Cooperative.
Slattery, of Maribel, has been a farmer since 1999. Before that he spent a decade working for a Japanese bank at the World Trade Center and six years with a U.S. finance company in Tokyo.
Independent Jeff Dahlke of Mequon also is running.
Grothman, a former state senator, was first elected to Congress in 2014.