2010Final results
2010 election for Arizona's 4th District
U.S. House · Arizona
Ed Pastor (D) won with 66.9% of the vote, defeating Janet Contreras (R) by 39.4 points.
Ed PastorDemocrat · winner
66.9%61,524
Janet ContrerasRepublican
27.5%25,300
Joe CobbLibertarian
3.0%2,718
Rebecca DewittGreen
2.6%2,365
91,907 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.
Ed PastorJanet Contreras
$1M
Raised by the campaign
$82.9K
$1.1M
Spent by the campaign
$82.9K
$1.4M
Cash on hand
$38
Campaign money: FEC, through Dec 31, 2010.
Source: FEC campaign filingsUpdated Dec 31, 2010
The candidates
Ed Pastor (D)Janet Contreras (R)
Also on the ballot: Joe Cobb (Libertarian), 3.0%; Rebecca Dewitt (Green), 2.6%