2004Final results
2004 election for U.S. Senate in Maryland
U.S. Senate · Maryland
Barbara A. Mikulski (D) won with 64.8% of the vote, defeating E. J. Pipkin (R) by 31.1 points.
Barbara A. MikulskiDemocrat · winner
64.8%1,504,691
E. J. PipkinRepublican
33.7%783,055
Maria AllwineGreen
1.1%24,816
Thomas TrumpConstitution
0.4%9,009
2,321,931 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.
Barbara A. MikulskiE. J. Pipkin
$5.9M
Raised by the campaign
$2.3M
$6M
Spent by the campaign
$2.3M
$276.9K
Cash on hand
$13K
Campaign money: FEC, through Dec 31, 2004.
Source: FEC campaign filingsUpdated Dec 31, 2004
The candidates
Barbara A. Mikulski (D)E. J. Pipkin (R)
Also on the ballot: Maria Allwine (Green), 1.1%; Thomas Trump (Constitution), 0.4%