Elections / 1986 · Senate · IA
The Republican candidate won Iowa's Senate seat R+32.5.
Iowa, 1986. Candidate results and statewide totals below.
Iowa — 1986 Senate result
Source: MIT Election Data + Science Lab, 1976–2024 Senate returns (party-classified by literal ballot party).
Democratic (D)
299,406
33.6%
Republican (R)
588,880
66.0%
All others
3,476
0.4%
Margin
R+32.5
Candidates
Statewide candidate totals — MIT Election Data + Science Lab, 1986 Senate returns.
| Candidate | Party | Votes | Share |
|---|---|---|---|
| Charles E. Grassley | RRepublican | 588,880 | 66.0% |
| John O. Roehrick | DDemocrat | 299,406 | 33.6% |
| John Masters | ONominated By Petition | 3,370 | 0.4% |
| Scatter | OOther | 106 | 0.0% |
Iowa's Senate margins
Every contest in our store, 1978–2022
| Year | Margin (D minus R) |
|---|---|
| 1978 | −3.2% |
| 1980 | −7.9% |
| 1984 | +11.8% |
| 1986 | −32.5% |
| 1990 | +9.1% |
| 1992 | −42.4% |
| 1996 | +5.1% |
| 1998 | −37.9% |
| 2002 | +10.4% |
| 2004 | −42.3% |
| 2008 | +25.4% |
| 2010 | −31.1% |
| 2014 | −8.3% |
| 2016 | −24.5% |
| 2020 | −6.6% |
| 2022 | −12.2% |