Riding profile

CA-1

US House district — CA · Mixed · us ca

The question

CA-1: will Republican lose this seat to Democrat?

Editorial read

CA-1, a mixed riding in CA, elected a member with the Republicans in the previous cycle, with a 29-point margin. The Vote-Scope model projects the Democrats ahead at 59% vote share, against 41% for the Republicans, and the probability of a close race is negligible.

Sitting member

LAMALFA, DOUG

Sits with Republican

Primary race

Who leads in the primary

Democrat

Mike McGuire 33%

3 candidates polled · Latest poll Feb 28, 2026 · bydavid_binder_research

Republican

James Gallagher 30%

2 candidates polled · Latest poll Feb 28, 2026 · bydavid_binder_research

Who's running

The candidates

Declared and on-ballot candidates for the upcoming election.

  • Republican Incumbent

    Lamalfa, Doug

  • Democrat Challenger

    Denney, Audrey

  • Democrat Challenger

    Mcguire, Mike

  • Democrat Challenger

    Salegui, James

  • Democrat Challenger

    Wilson, Kyle

  • Republican Challenger

    Gallagher, James

Current forecast

Democrat

Safe

Probability
100%
Mean margin (pts)
17.8
P(close race)
0%

Projected vote share

Projection by party

  • Democrat 58.9%
  • Republican 41.1%

In context

How this riding stacks up

Democrat Republican
HereCA-1 58.9%41.1%
National averageUnited States 51.9% +7.0 46.6% −5.5

Nationwide averages computed across the 435 riding-level projections (unweighted mean).

Projection track

How the projection has moved

Previous election · US HOUSE_2024

Won by
Republican
Margin
28.9 pts
Margin shift vs current projection
-11.1 pts

Redistricting impact

Where these voters came from

This district was redrawn under the 2025-2026 mid-decade redistricting. Composition by inherited old-district share:

  • Congressional District 1 (06001) 59%
  • Congressional District 3 (06003) 20%
  • Congressional District 2 (06002) 15%
  • Congressional District 4 (06004) 6%
Last model run
Cycle
us_house_2026