United States / 2026 United States Senate election in South Dakota
Impact Research (D)
Voting intention · published 19 Aug 2026
- Country
- 🇺🇸 United States
- Election
- 2026 United States Senate election in South Dakota
- Polling institute
- Impact Research (D)
- Published
- 19 Aug 2026
- Fieldwork
- 13 Aug 2026 – 17 Aug 2026
- Sample size
- 500
- Margin of error
- ±4.4 est. (Not published: estimated from sample size (95%, simple random sample))
- Methodology
- Not published
Results
Impact Research (D), 19 Aug 2026: Rounds (R) and Bengs (I) are tied at 44.0%.
- Mike Rounds (R)44.0%new
- Brian Bengs (I)44.0%new
No earlier poll by this institute for this election, so no change is shown.
How to read a poll
- Sample size is how many people were asked. More people means less random error, never none.
- ±3 is the margin of error: the real figure is likely within 3 points either way of the one shown.
- Two polls can differ because they were taken on different dates, with different methods and different samples.
- est. means the institute did not publish a margin of error, so it is estimated from the sample size.
- The average smooths this out: it combines recent polls, so one unusual poll cannot swing the picture.