2020Final results
2020 election for California Assembly District 18
California State Assembly · California
Rob Bonta (D) won with 87.6% of the vote, defeating Stephen Slauson (R) by 75.2 points.
Rob BontaDemocrat · winner · incumbent
87.6%190,168
Stephen SlausonRepublican
12.4%26,942
217,110 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET