2004Final results
2004 election for U.S. Senate in Iowa
U.S. Senate · Iowa
Chuck Grassley (R) won with 70.2% of the vote, defeating Arthur Small (D) by 42.3 points.
Chuck GrassleyRepublican · winner
70.2%1,038,175
Arthur SmallDemocrat
27.9%412,365
Christy Ann WeltyLibertarian
1.0%15,218
Daryl A. NorthropGreen
0.8%11,121
Edwin FruitSocialist Workers
0.1%1,874
1,479,228 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.
Arthur SmallChuck Grassley
$140.2K
Raised by the campaign
$5.7M
$135.5K
Spent by the campaign
$6.4M
$1K
Cash on hand
$2M
Campaign money: FEC, through Dec 31, 2004.
Source: FEC campaign filingsUpdated Dec 31, 2004
The candidates
Chuck Grassley (R)Arthur Small (D)
Also on the ballot: Christy Ann Welty (Libertarian), 1.0%; Daryl A. Northrop (Green), 0.8%; Edwin Fruit (Socialist Workers), 0.1%