2018Final results
2018 election for U.S. Senate in California
U.S. Senate · California
Dianne Feinstein (D) won with 54.2% of the vote, defeating Kevin De Leon (D) by 8.3 points.
Dianne FeinsteinDemocrat · winner
54.2%6,019,422
Kevin De LeonDemocrat
45.8%5,093,942
11,113,364 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.
Dianne FeinsteinNo Republican
$18.6M
Raised by the campaign
—
$21M
Spent by the campaign
—
$92.3K
Cash on hand
—
Other candidates' campaigns: Kevin De Leon $1.8M.
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018