Primary
Primary held June 2, 2026.
Democratic Primary
| Candidate | Votes | % | |
|---|---|---|---|
| Zoe Lofgren ✓ | 65,291 | 54.9% | |
| Luis Arreguín | 15,384 | 12.9% |
No party preference Primary
| Candidate | Votes | % | |
|---|---|---|---|
| Chris Demers | 3,447 | 2.9% |
Republican Primary
| Candidate | Votes | % | |
|---|---|---|---|
| Shane Lewis ✓ | 34,883 | 29.3% |
Full calendar and every race: California primary guide
Race Overview
Incumbent
Zoe Lofgren
Party
Democrat
Current Rating
Open Seat
No
Cook PVI
D+22
Candidates
Average reflects all polls from the last 90 days; table shows the most recent 30 days or the newest 3 polls, whichever is more. How accurate is each pollster? →
No polls in the last 90 days.
Questions About This Race
Is the 2026 CA-18 House race competitive?
No — the expert consensus rates it Safe D for Democrats.
When is the 2026 CA-18 House race decided?
Election Day is Tuesday, November 3, 2026.
How is the PollingSource average calculated?
The PollingSource average is the unweighted mean of every scientific public poll of the race from the last 90 days — we do not exclude pollsters. Each race page lists the individual polls behind the average with pollster, field dates, sample size, and margin of error. Full details: pollingsource.com/methodology.
Race News
No news coverage yet for this race.