Voters in California, Iowa, Montana, New Jersey, New Mexico and South Dakota cast ballots on Tuesday in primary elections ahead of the 2026 midterm general election in November.

Six states — California, Iowa, Montana, New Jersey, South Dakota and New Mexico — hold elections on Tuesday. Here are key races to follow.

Voters across the U.S. will visit the polls on Tuesday to decide primary races in California, Iowa, New Jersey, New Mexico, South Dakota and Montana.