The 1998 United States Senate election in Iowa was held November 3, 1998. Incumbent Republican United States Senator Chuck Grassley sought re-election to a fourth term in the United States Senate, running against former State Representative David Osterberg, who won the Democratic nomination unopposed. Grassley had not faced a competitive election since 1980; this year proved no different, and Grassley defeated Osterberg in a landslide.
Democratic primary
Candidates David Osterberg, former State Representative
Results
Republican primary
Candidates Chuck Grassley, incumbent United States Senator
Results
General election Debate + 1998 Iowa United States Senate election debate Date Host Moderator Link Republican DemocraticKey: Participant Absent Not invited Invited Withdrawn Chuck Grassley David Osterberg1 Oct. 19, 1998 Iowa Public Television Dean Borg C-SPAN
Polling Poll source Date(s)administered Samplesize Marginof error ChuckGrassley (R) DavidOsterberg (D) UndecidedMason DixonOctober 25–27, 1998803 (LV)± 3.5%68%24%8%Mason DixonOctober 11–13, 1998809 (LV)± 3.5%67%22%11%Mason DixonSeptember 12–14, 1998804 (LV)± 3.5%69%19%12%Mason DixonJuly 18–21, 1998834 (LV)± 3.5%68%17%15%Selzer & CompanyJune 20–24, 1998581 (LV)± 4.0%72%18%10%
Results
See also 1998 United States Senate elections
Notes
References