Our forecast
Starts when the candidates are set and the polls come in.
November 7, 2028 · All races
Starts when the candidates are set and the polls come in.
| Year | Winner | Result |
|---|---|---|
| 2022 | Chuck Grassley (R) | won by 12.2 points |
| 2016 | Chuck Grassley (R) | won by 24.5 points |
| 2010 | Chuck Grassley (R) | won by 31.1 points |
2024: Republican by 13.2 · 2020: Republican by 8.2
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