2006Final results
2006 election for U.S. Senate in California
U.S. Senate · California
Dianne Feinstein (D) won with 59.4% of the vote, defeating Richard "dick" Mountjoy (R) by 24.4 points.
Dianne FeinsteinDemocrat · winner
59.4%5,076,289
Richard "dick" MountjoyRepublican
35.0%2,990,822
Todd ChretienGreen
1.7%147,074
Michael S. MettiLibertarian
1.6%133,851
Marsha FeinlandPeace and Freedom
1.4%117,764
Don J. GrundmannIndependent
0.9%75,350
8,541,476 votes
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
The seat over time
D − R margin in this seat's races around 2006
Races before and after
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 7:25 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Dianne FeinsteinRichard "dick" Mountjoy
$8.2M
Raised by the campaign
$198.6K
$8M
Spent by the campaign
$195.3K
$3.2M
Cash on hand
$3.9K
Other candidates' campaigns: Todd Chretien $61.5K.
Campaign money: FEC, through Dec 31, 2006.
Source: FEC campaign filingsUpdated Dec 31, 2006
The candidates
Dianne Feinstein (D)Richard "dick" Mountjoy (R)
Also on the ballot: Todd Chretien (Green), 1.7%; Michael S. Metti (Libertarian), 1.6%; Marsha Feinland (Peace and Freedom), 1.4%; Don J. Grundmann (Independent), 0.9%