Indiana voters head to the polls Tuesday for primaries that will determine nominees for all nine U.S. House seats and dozens of state legislative races. Intraparty fights, particularly among Republicans, will shape some of the most closely watched contests in the 2026 midterm elections.

What’s on the ballot

Indiana’s primary is open, meaning voters do not have to be registered with a party to participate. However, if a voter selects a Republican ballot, they will only have access to GOP candidates and will not have a say in the Democratic primary.