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 Assembly · November 3, 2026 · Updated Oct 16, 2026
California Assembly District 29
Top twoRivas is very likely to win: Rivas wins in more than 99 of every 100 simulations.
Rivas (D)
>99%
chance of winning
Sanchez (R)
<1%
- Average margin
- D+35.9
- 80% of outcomes
- D+25 to D+47
- Partisan lean
- D+28
- Polls
- No pollsmodel only
Rivas is very likely to win: Rivas wins in more than 99 of every 100 simulations.
Rivas (D)
>99%
chance of winning
Sanchez (R)
<1%
- Average margin
- D+32.6
- 80% of outcomes
- D+19 to D+46
- Partisan lean
- D+28
- Polls
- No pollsmodel only
How this race is decided
Range of outcomes
Final margin across our simulations; the white dashes mark the middle 80%.
The candidates
DemocraticIncumbent
Robert Rivas
- Experience
- State legislature
Republican
Dennis Sanchez
What goes into the forecast
Every ingredient's estimate of the final margin.
- National environment
- D+9.5Election Day forecast
- California state offices
- −0.6Polls for governor, statewide and legislative races · details
- Environment here
- D+8.9Used by the fundamentals
- Swing reaching this office
- 58%Of a shift in the environment, from past legislative races since 2016
- Pacific adjustment
- −1.7How legislative races in the region have run against lean and environment lately
Each estimate is a margin before national and statewide uncertainty is simulated. Horizon blends polls, fundamentals and a little of the similar-places estimate, weighting each by how precise it is; Pulse uses polls and similar places only.
Fundamentals inputs
| Incumbency (+1 D, −1 R) | 1 |
| Fundraising edge (log ratio of individual money) | 3.72 |
| Elected-experience edge | 0.67 |
| First-term incumbent | 0 |
| Seat's last result vs. expectation | 6.3 |
| Incumbent's last result vs. expectation | 6.3 |
Polls
No public polls of this race. The forecast relies on fundamentals and on polling of similar places in the state.
The district
Lean D+28: 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
- 493,480
- People per km²
- 68
- Adults with a B.A.+
- 20%
- White, no degree
- 16%of adults
- White 19%
- Hispanic 72%
- Black 1%
- Asian 5%
- Other / multiracial 3%
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
150,861 votes · D+32.0✓ Robert Rivas (D)66.0%
Jw Paine (R)34.0%
2024 President Vote in this district
150,448 two-party votes · D+24.1 · D+25.6 vs. the nation✓ Kamala Harris (D)62.1%
Donald Trump (R)37.9%
2022
99,469 votes · D+27.6✓ Robert Rivas (D)63.8%
Stephanie L Castro (R)36.2%
2020 Earlier district lines
254,268 votes · D+45.9✓ Mark Stone (D)73.0%
Shomir Banerjee (R)27.0%
2020 President Vote in this district
167,072 two-party votes · D+40.7 · D+36.2 vs. the nation✓ Joe Biden (D)70.4%
Donald Trump (R)29.6%
2016 President Vote in this district
125,689 two-party votes · D+43.7 · D+41.5 vs. the nation✓ Hillary Clinton (D)71.9%
Donald Trump (R)28.1%