South Dakota — U.S. Senate
Currently held by a Republican · incumbent running
Democrat
(No Democrat)
0.0%
Republican
Mike Rounds
100.0%
ForecastSafe R
- Projected margin
- R+29.2
- 80% range
- R+43.0 to R+15.3
- Partisan lean
- R+28.9
- Uncertainty multiplier
- 1.80×
The 80% range comes from 200,000 simulations in which this race’s error is correlated with every other race through the national, state and demographic layers.
How the estimate is built
100.0%
Fundamentals 100.0%
- Polling average
- no polls
- Fundamentals
- R+28.6
- Blended
- R+28.6
- Similar-race shift
- +1.5
Polling
No public polling of this matchup. The forecast rests on fundamentals plus the polling residuals of demographically and politically similar races — which is the normal case: most of the 435 House seats are never polled.
Fundamentals
- Partisan lean
- R+28.9
- Elasticity
- 0.94
- Incumbency
- −4.2
- Candidate experience
- −0.8
- Fundraising
- −3.2
- National environment
- D+5.4
- Expected margin
- R+30.1