Top-two primary
All candidates run in one primary regardless of party and the two with the most votes advance, so two candidates of the same party can meet in November. The forecast then marks the seat as safe for that party.
California › California State Senate · November 3, 2026 · Updated Oct 16, 2026
California State Senate District 12
Top twoNathan Magsig has no major-party opponent.
Nathan Magsig has no major-party opponent.
How this race is decided
Staggered Senate
Senators serve four-year terms; half the seats (the even-numbered districts in 2026) are on the ballot each election.
The candidates
Republican
Nathan Magsig
Libertarian
William Brown Jr.
The district
Lean R+25: how much more Democratic or Republican than the nation it votes for president.
Presidential vote
Precinct results re-aggregated to the current district lines.
Who lives here
- Population
- 996,845
- People per km²
- 29
- Adults with a B.A.+
- 31%
- White, no degree
- 33%of adults
- White 45%
- Hispanic 38%
- Black 4%
- Asian 8%
- Other / multiracial 6%
American Community Survey 2020–2024, aggregated from census tracts.
Past results
Results in the same-numbered district; earlier elections may have used different lines.
2024 President Vote in this district
401,730 two-party votes · R+26.5 · R+25.0 vs. the nation✓ Donald Trump (R)63.3%
Kamala Harris (D)36.7%
2022
285,483 votes · R+37.3✓ Shannon Grove (R)68.7%
Susanne Gundy (D)31.3%
2020 President Vote in this district
431,404 two-party votes · R+20.3 · R+24.8 vs. the nation✓ Donald Trump (R)60.1%
Joe Biden (D)39.9%
2018 Earlier district lines
203,077 votes · D+8.7✓ Anna Caballero (D)54.4%
Rob Poythress (R)45.6%
2016 President Vote in this district
325,066 two-party votes · R+27.3 · R+29.5 vs. the nation✓ Donald Trump (R)63.7%
Hillary Clinton (D)36.3%
2014 Earlier district lines
124,027 votes · R+20.9✓ Anthony Cannella (R)60.5%
Shawn K Bagley (D)39.5%