2016Final results
2016 election for California Assembly District 18
California State Assembly · California
Rob Bonta (D) won with 87.0% of the vote, defeating Roseann Slonsky-Breault (R) by 74.1 points.
Rob BontaDemocrat · winner · incumbent
87.0%156,163
Roseann Slonsky-BreaultRepublican
13.0%23,273
179,436 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 4:52 AM ET
The seat over time
D − R margin in this seat's races around 2016
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 4:52 AM ET