# 1984 United States Senate election in Iowa

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The 1984 United States Senate election in Iowa was held on November 6, 1984. Incumbent Republican Senator Roger Jepsen ran for re-election to a second term in office. Jepsen was opposed by U.S. Representative Tom Harkin, from Iowa's 5th congressional district, who won the Democratic primary uncontested.
The general election was full of mudslinging and personal attacks, including the embellishment by both candidates of their military records; Harkin attacked Jepsen for failing to keep his promise to not sell AWACS aircraft to Saudi Arabia. Ultimately, Harkin defeated Jepsen in a landslide 152,502 votes, winning the first of five terms in the Senate. This is the last time that a Senator from Iowa lost re-election.

## Democratic primary
### Candidates

* Tom Harkin, United States Congressman from Iowa's 5th congressional district

### Results

Democratic primary results :
| Party | Party | Candidate | Votes | % |
| | Democratic | Tom Harkin | 106,005 | 99.93% |
| | Democratic | Write-ins | 70 | 0.07% |
| Total votes | Total votes | Total votes | 106,075 | 100.00% |

## Republican primary
### Candidates

* Roger Jepsen, incumbent U.S. Senator

### Results

Republican primary results :
| Party | Party | Candidate | Votes | % |
| | Republican | Roger Jepsen (incumbent) | 113,996 | 99.87% |
| | Republican | Write-ins | 147 | 0.13% |
| Total votes | Total votes | Total votes | 114,143 | 100.00% |

## General election
### Results

United States Senate election in Iowa, 1984 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Tom Harkin | 716,883 | 55.46% | +7.54% |
| | Republican | Roger Jepsen (incumbent) | 564,381 | 43.66% | −7.47% |
| | Independent | Garry De Young | 11,014 | 0.85% | |
| | Write-in | Write-in | 422 | 0.03% | |
| Majority | Majority | Majority | 152,502 | 11.80% | +8.58% |
| Turnout | Turnout | Turnout | 1,292,700 | | |
| | Democratic gain from Republican | Democratic gain from Republican | Swing | | |