2004 United States Senate election in Iowa

2004 United States Senate election in Iowa

←  1998 November 2, 2004 2010  →

Nominee Chuck Grassley Arthur A. Small Party Republican Democratic Popular vote 1,038,175 412,365 Percentage 70.18% 27.88%

County results Grassley:     50-60%     60-70%     70-80%     80-90%     >90%

U.S. senator before election Chuck Grassley Republican Elected U.S. Senator Chuck Grassley Republican

The 2004 United States Senate election in Iowa was held on November 2, 2004. Incumbent Republican United States Senator Chuck Grassley ran for re-election to a fifth term in the United States Senate. Grassley and former State Senator Arthur A. Small won the Republican and Democratic primaries, respectively, unopposed, and faced each other in the general election. Though this election coincided with the highly competitive presidential election, Grassley was not considered vulnerable and defeated Small in a landslide.

As of 2025, this is the last time a Republican Senate candidate won Johnson County. As of 2024, this is also the last time that the winning United States Senate candidate carried all counties in Iowa for this seat.

Democratic primary

Candidates

• Arthur A. Small, attorney, lobbyist, and former Iowa State Senator

Results

Democratic primary results ^[1]

Party		Candidate	Votes	%
	Democratic	Arthur A. Small	52,318	99.25%
	Democratic	Write-ins	398	0.75%
Total votes			52,716	100.00%

Republican primary

Candidates

• Chuck Grassley, incumbent United States Senator

Results

Republican primary results ^[1]

Party		Candidate	Votes	%
	Republican	Chuck Grassley (Incumbent)	78,819	99.72%
	Republican	Write-ins	218	0.28%
Total votes			79,037	100.00%

General election

Predictions

Source	Ranking	As of
Sabato's Crystal Ball [2]	Safe R	November 1, 2004

Results

United States Senate election in Iowa, 2004 ^[3]

Party		Candidate	Votes	%	±%
	Republican	Chuck Grassley (Incumbent)	1,038,175	70.18%	+1.77%
	Democratic	Arthur A. Small	412,365	27.88%	−2.62%
	Libertarian	Christy Ann Welty	15,218	1.03%
	Green	Daryl A. Northrop	11,121	0.75%
	Socialist Workers	Edwin Fruit	1,874	0.13%	−0.14%
	Write-ins		475	0.03%
Majority			625,810	42.31%	+4.39%
Turnout			1,479,228
	Republican hold		Swing

See also

• 2004 United States Senate elections

References

1. "Canvass Summary" (PDF). sos.iowa.gov. June 23, 2004. Retrieved October 15, 2019.
2. "The Final Predictions". Sabato's Crystal Ball. Retrieved May 2, 2021.
3. "MICROCOMP output file" (PDF). Retrieved October 15, 2019.