Iowa Gov. Kim Reynolds, who has been running ahead in polling and fundraising, is favored to be reelected next week. Republicans are well-positioned to retain control of the chamber.
Missouri's top race is between Eric Schmitt and Trudy Busch Valentine for a U.S. Senator seat. The state is requiring residents to have voter identifications in this year's election.
Maine Gov. Janet Mills will face off against GOP predecessor Paul LePage. In the 2nd House district, former Rep. Bruce Poliquin hopes to oust Rep. Jared Golden, whom he lost to in 2018.
Former Interior Sec. Ryan Zinke is back on the congressional ballot in Montana, alongside legal protection for born-alive infants and search and seizure measures for electronic data.