At-large district
RMarty Jackley
60.0%
average of 1 poll
DNikki Gronli
32.0%
average of 1 poll
Difference: 28.0 points
Photos: Marty Jackley, US District of South Dakota, Public domain. Candidates without a freely licensed photo are shown by initials.
Plain average R+28.0, corrected R+27.1 · 1 pollster, fieldwork through 2026-10-14
| Pollster | Fieldwork | Sample | Result | Margin |
|---|---|---|---|---|
| Mason-Dixon | 2026-10-12 to 2026-10-14 | 500 LV | Marty Jackley (R) 60; Nikki Gronli (D) 32; Undecided (UND) 9 | R+28.0 |