2010Final results
2010 election for California's 49th District
U.S. House · California
Darrell Issa (R) won with 62.8% of the vote, defeating Howard Katz (D) by 31.3 points.
Darrell IssaRepublican · winner
62.8%119,088
Howard KatzDemocrat
31.5%59,714
Dion ClarkAmerican Independent
3.5%6,585
Mike PasterLibertarian
2.3%4,290
189,677 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 2010
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.
Howard KatzDarrell Issa
$15.4K
Raised by the campaign
$1.5M
$14.9K
Spent by the campaign
$1.2M
$504
Cash on hand
$386K
Campaign money: FEC, through Dec 31, 2010.
Source: FEC campaign filingsUpdated Dec 31, 2010
The candidates
Darrell Issa (R)Howard Katz (D)
Also on the ballot: Dion Clark (American Independent), 3.5%; Mike Paster (Libertarian), 2.3%