2017Final resultsSpecial election
2017 special election for Kansas's 4th District
U.S. House · Kansas
Ron Estes (R) won with 52.2% of the vote, defeating James A. Thompson (D) by 6.2 points.
Ron EstesRepublican · winner
52.2%64,044
James A. ThompsonDemocrat
46.0%56,435
Chris RockholdLibertarian
1.7%2,115
122,594 votes
Source: Federal Election CommissionUpdated Oct 3, 2026, 3:20 AM ET
The seat over time
D − R margin in this seat's races around 2017
Races before and after
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)
Polls against the result
- Poll with Thompson ahead
- Poll with Estes ahead
- Result
| Pollster | Dates | Sample | Thompson | Estes | Margin | Adjusted | Miss vs result | Grade | Release |
|---|---|---|---|---|---|---|---|---|---|
| Lincoln Park StrategiesD-sponsored | Mar 3 | 500 | 32 | 56 | R+24 | — | −17.8 | — | Wikipedia |
Adjusted: after correcting for the pollster's house effect and likely-voter screens. Miss: the poll's margin minus the result; + means the poll leaned Democratic. Grade: the pollster's accuracy in past elections, A+ to D (pollster ratings).
Source: Each poll's release, via FiveThirtyEight poll listsUpdated Mar 3, 2017