2018Final results
2018 election for California's 37th District
U.S. House · California
Karen Bass (D) won with 89.1% of the vote, defeating Ron J. Bassilian (R) by 78.2 points.
Karen BassDemocrat · winner
89.1%210,555
Ron J. BassilianRepublican
10.9%25,823
236,378 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
Money in this race
Each line compares the two campaigns on one scale.
Karen BassRon J. Bassilian
$896.5K
Raised by the campaign
$10.4K
$829.6K
Spent by the campaign
$10.1K
$312.3K
Cash on hand
$240
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018