California Senate District 12
California State Senate · California
Nathan Magsig held the seat for Republicans, winning by 26.2 points over William Brown Jr..
Top-two primaryStaggered Senate
Source: California Secretary of State unofficial resultsUpdated Nov 7, 2026, 12:54 PM ET
Where the race moved
Against the 2024 presidential vote
The seat's recent races
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)
Money in this race
Each line compares the two campaigns on one scale.
Campaign money: California Secretary of State (Cal-Access), through Oct 17, 2026.
Source: California Secretary of State (Cal-Access) campaign filingsUpdated Oct 17, 2026
Pre-election forecast (final, Nov 3)
Our model's last run before Election Day, Nov 3, 2026. It no longer updates.
No Democrat was on the ballot, so the model gave the seat to Nathan Magsig without simulating it.
How the forecast works →