California 18th — House 2026 Primary
The California 18th — House primary is scheduled for June 2, 2026. The model has Democrat Zoe Lofgren narrowly ahead of Chris Demers, 42% to 31% in a 4-candidate field. Zoe Lofgren 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
- Zoe Lofgren (incumbent) — 42%
- Chris Demers — 31%
- Shane Lewis — 22%
- Luis Arreguín — 5%
Probabilities update daily from polls, fundraising, endorsements, and historical results.