2018Flipped from RepublicanFinal results
2018 election for California's 48th District
U.S. House · California
Harley Rouda (D) won with 53.6% of the vote, defeating Dana Rohrabacher (R) by 7.1 points, a seat Republicans won last time.
Harley RoudaDemocrat · winner
53.6%157,837
Dana RohrabacherRepublican
46.4%136,899
294,736 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.
Harley RoudaDana Rohrabacher
$8.7M
Raised by the campaign
$2.8M
$8.5M
Spent by the campaign
$3M
$275.7K
Cash on hand
$45.9K
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018