Democratic Delaware Rep. Lisa Blunt Rochester is expected to easily win re-election, as is Auditor Lydia York, who previously unseated an incumbent indicted on corruption charges.
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.
In Arizona, the election for a Senate seat could determine whether Republicans or Democrats gain the Senate majority. On House-side elections, GOP hopes to grab several seats from Dems.
Republicans Joe Akana and Duke Aiona, two previously unsuccessful Hawaii candidates, are running again. However, Democrats are expected to control the state in this year's midterms.
In Minnesota, Democratic Gov. Tim Walz is up for reelection against Scott Jensen. Walz pulled nearly 54 percent of the vote in 2018, but the race is expected to be tighter this year.