2004Final results
2004 election for California's 23rd District
U.S. House · California
Lois Capps (D) won with 63.0% of the vote, defeating Don Regan (R) by 28.7 points.
Lois CappsDemocrat · winner
63.0%153,980
Don ReganRepublican
34.4%83,926
Michael FavoriteLibertarian
2.6%6,391
244,297 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 2004
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.
Lois CappsDon Regan
$1.1M
Raised by the campaign
$148.7K
$1M
Spent by the campaign
$148.6K
$307.4K
Cash on hand
$51
Campaign money: FEC, through Dec 31, 2004.
Source: FEC campaign filingsUpdated Dec 31, 2004