California 21th — House 2026 Primary
The California 21th — House primary is scheduled for June 2, 2026. The model favors Democrat Jim Costa at 68%, ahead of Republican Lorenzo Rios at 12% in a 6-candidate field. Jim Costa is the incumbent, leads the field in reported fundraising, and has the most tracked endorsements. No public polling is available for this race, so the forecast leans on fundraising, endorsements, candidate profiles, and historical results.
Current win probabilities
- Jim Costa (incumbent) — 68%
- Lorenzo Rios — 12%
- Kyle Kirkland — 10%
- Lance Kruse — 4%
- Eric Garcia — 3%
- Lourin Hubbard — 3%
Probabilities update daily from polls, fundraising, endorsements, and historical results.