Iowa Rep. Brian Lohse loses to Austin Stubbs in his Republican primary as metro Des Moines residents vote on Iowa House seats.

Republican businessman Toby Doeden has advanced to runoff primary in South Dakota governor’s race, NBC News projects.Gov.

Buoyed by a new Congressional map favoring their party, California Democrats were eyeing Tuesday’s primary elections as a critical first step toward flipping a handful of House seats and taking back power in Washington.

The first wave of results in the closely watched June 2 primary — largely made up of early vote-by-mail ballots — is expected shortly, but it could take until the wee hours of the morning before any winners can be declared.