2018Final results
2018 election for California Assembly District 18
California State Assembly · California
Rob Bonta (D) won with 88.9% of the vote, defeating Stephen Slauson (R) by 77.7 points.
Rob BontaDemocrat · winner · incumbent
88.9%150,862
Stephen SlausonRepublican
11.1%18,894
169,756 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET