2004Final results
2004 election for U.S. Senate in Pennsylvania
U.S. Senate · Pennsylvania
Arlen Specter (R) won with 52.6% of the vote, defeating Joseph Hoeffel (D) by 10.6 points.
Arlen SpecterRepublican · winner
52.6%2,925,080
Joseph HoeffelDemocrat
42.0%2,334,126
James N. ClymerConstitution
4.0%220,056
Betsy SummerLibertarian
1.4%79,263
5,558,525 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.
Joseph HoeffelArlen Specter
$4.6M
Raised by the campaign
$15M
$4.5M
Spent by the campaign
$20.3M
$16.2K
Cash on hand
$568.8K
Other candidates' campaigns: James N. Clymer $219K.
Campaign money: FEC, through Dec 31, 2004.
Source: FEC campaign filingsUpdated Dec 31, 2004
The candidates
Arlen Specter (R)Joseph Hoeffel (D)
Also on the ballot: James N. Clymer (Constitution), 4.0%; Betsy Summer (Libertarian), 1.4%