Iowa / Senate
How did Iowa vote for the Senate?
2022 · data family: electiondata.dev
Chuck Grassley (Republican) won by 12.0 points
12.0ptsSenate, 2022: winner's margin
- Chuck Grassley (Republican) 55.4%, Michael Franken (Democrat) 43.3%, Under Votes (party not recorded) 1.1%
- 1,230,416 votes for Senate candidates
Compare every state: where Iowa ranks for 2022
- Democrat ahead
- Republican ahead
Show the numbers (16 rows)
| Year | Margin |
|---|---|
| 2022 | R +12.0 |
| 2020 | R +6.5 |
| 2016 | R +24.4 |
| 2014 | R +8.3 |
| 2010 | R +31.1 |
| 2008 | D +25.4 |
| 2004 | R +42.3 |
| 2002 | D +10.4 |
| 1998 | R +37.9 |
| 1996 | D +5.1 |
| 1992 | R +42.4 |
| 1990 | D +9.1 |
| 1986 | R +32.5 |
| 1984 | D +11.8 |
| 1980 | R +7.9 |
| 1978 | R +3.2 |
Every Senate race since 1976
| Race | Winner | Runner-up | Margin | Votes |
|---|---|---|---|---|
| 2022 | Chuck Grassley (R) 55.4% | Michael Franken (D) 43.3% | 12.0 pts | 1,230,416 |
| 2020 | Joni Ernst (R) 50.9% | Theresa Greenfield (D) 44.4% | 6.5 pts | 1,700,130 |
| 2016 | Chuck Grassley (R) 60.1% | Patty Judge (D) 35.7% | 24.4 pts | 1,541,036 |
| 2014 | Joni Ernst (R) 52.1% | Bruce Braley (D) 43.8% | 8.3 pts | 1,129,700 |
| 2010 | Chuck Grassley (R) 64.4% | Roxanne Conlin (D) 33.3% | 31.0 pts | 1,116,063 |
| 2008 | Tom Harkin (D) 62.7% | Christopher Reed (R) 37.3% | 25.4 pts | 1,502,918 |
| 2004 | Charles E. Grassley (R) 70.2% | Arthur Small (D) 27.9% | 42.3 pts | 1,479,228 |
| 2002 | Tom Harkin (D) 54.2% | Greg Ganske (R) 43.8% | 10.4 pts | 1,023,075 |
| 1998 | Charles E. Grassley (R) 68.4% | David Osterberg (D) 30.5% | 37.9 pts | 947,907 |
| 1996 | Tom Harkin (D) 51.8% | Jim Lightfoot (R) 46.7% | 5.1 pts | 1,224,054 |
| 1992 | Chuck Grassley (R) 69.6% | Jean Lloyd-jones (D) 27.2% | 42.4 pts | 1,292,494 |
| 1990 | Tom Harkin (D) 54.5% | Thomas J. Tauke (R) 45.4% | 9.1 pts | 983,933 |
| 1986 | Charles E. Grassley (R) 66.0% | John O. Roehrick (D) 33.6% | 32.5 pts | 891,762 |
| 1984 | Tom Harkin (D) 55.5% | Roger W. Jepsen (R) 43.7% | 11.8 pts | 1,292,700 |
| 1980 | Charles E. Grassley (R) 53.5% | John Culver (D) 45.5% | 7.9 pts | 1,276,986 |
| 1978 | Roger W. Jepsen (R) 51.1% | Dick Clark (D) 47.9% | 3.2 pts | 824,576 |
Get this data
This page's numbers, as JSON:
curl https://visualizedata.org/data/places/us-ia/senate.jsonEvery Senate race, every state, from electiondata.dev (live, no key):
curl "https://api.electiondata.dev/v1/senate-results/download/senate-results.csv"What this can't tell you
- Statewide totals say nothing about who voted or why.
- Candidates with a party's support under another name (Minnesota's DFL, New York's fusion lines) are counted with that party, as the MIT data's simplified party does; independents stay independents.
How the answer is decided
Each candidate's votes are summed over every ballot line; blank, over- and under-votes are left out. The margin is the winner's share of the votes minus the runner-up's. A runoff, where held, is the result.