Nielson Brothers Polling
Nielson Brothers Polling has 3 polls in our database and is rated on 14 past polls scored against results (2010–2020).
Rated polls
142010–2020
Average miss
13.0All pollsters: 6.8
Lean
D+0.9Against other polls of the same races
Picked winner
93%Of rated polls
Last poll
Oct 28, 20202020 United States Senate election in South Dakota (2020)
Every rated poll against the result
Each dot is one poll from the last three weeks of a race: how far its margin landed from the result. Above the line it overstated Democrats; below, Republicans. Bars show each cycle’s average lean.
- Poll
- Cycle average
14 rated polls; misses beyond 25 points are drawn at the edge. Source: 99chambers pollster ratings and polls databaseUpdated Oct 22, 2026, 3:55 AM ET
By type of race
| Race type | Rated polls | Avg. miss | All pollsters | Lean | Picked winner |
|---|---|---|---|---|---|
| House | 5 | 9.7 | 6.8 | D+9.7 | 80% |
| President | 4 | 10.4 | 4.4 | D+10.4 | 100% |
| Senate | 4 | 17.9 | 5.5 | D+17.9 | 100% |
| Governor | 1 | 19.4 | 5.7 | D+19.4 | 100% |
Avg. miss: green where it beats all pollsters’ average for that type. Source: 99chambers pollster ratings and polls databaseUpdated Oct 22, 2026, 3:55 AM ET
Among all pollsters
Average miss of every rated pollster, in points. Nielson Brothers Polling is marked; darker bars are pollsters with a smaller miss.
Source: 99chambers pollster ratings and polls databaseUpdated Oct 22, 2026, 3:55 AM ET
Recent polls
All 3 in the database| Dates | Question | Sample | Result | Margin | vs result | Source |
|---|---|---|---|---|---|---|
| Oct 24–28, 2020 | 2020 United States Senate election in South Dakota (2020) | 479 LV | Ahlers 39 · Rounds 56 | R+17 | — | Release |
| Oct 24–26, 2016 | 2016 United States Senate election in South Dakota (2016) | 600 V | Williams 35 · Thune 54 | R+19 | — | Release |
| Oct 24–26, 2016 | 2016 South Dakota's at-large congressional district election (2016) | 600 V | Hawks 41 · Noem 51 | R+10 | — | Release |
Latest poll ended Oct 28, 2020. Source: each poll’s own release, via the 99chambers polls database
Who it polls for
Sponsors of its polls since 2016, by share of polls.
No polls for candidates or party committees on file.
Source: 99chambers pollster ratings and polls databaseUpdated Oct 22, 2026, 3:55 AM ET