Horizon · our Election Day forecast: polls, plus fundamentals like incumbency, fundraising and past results.

Pulse · polls only: where the races stand today, with no fundamentals and wider uncertainty.

What's the difference?

South Dakota › South Dakota State Senate · November 3, 2026 · Updated Oct 16, 2026

South Dakota Legislative District 27

Stadnick is favored to win: Stadnick wins in about 4 of every 5 simulations.

Stadnick (D)
78%
chance of winning
Kathol (R)
22%
Average margin
D+5.7
80% of outcomes
R+4 to D+16
Partisan lean
R+4
Polls
No pollsmodel only

Flip risk: Democratic-held seat, a toss-up (44% chance it changes parties).

A toss-up: each side wins about half the simulations.

Stadnick (D)
56%
chance of winning
Kathol (R)
44%
Average margin
D+1.5
80% of outcomes
R+12 to D+15
Partisan lean
R+4
Polls
No pollsmodel only

Range of outcomes

Final margin across our simulations; the white dashes mark the middle 80%.

D+5.7R+30R+20R+10EvenD+10D+20D+30
D+1.5R+30R+20R+10EvenD+10D+20D+30

How the odds have moved

Chance of winning by forecast date.

0%25%50%75%100%AugSepOctNovNov 3Stadnick 78%Kathol 22%

Updated nightly. Each day is the current model run on the polls that had ended by then (how).

0%25%50%75%100%AugSepOctNovNov 3Stadnick 56%Kathol 44%

Updated nightly. Each day is the current model run on the polls that had ended by then (how).

The candidates

What goes into the forecast

Every ingredient's estimate of the final margin.

National environment
D+9.5Election Day forecast
South Dakota state offices
+0.0Polls for governor, statewide and legislative races · details
Environment here
D+9.5Used by the fundamentals
Swing reaching this office
58%Of a shift in the environment, from past legislative races since 2016
Midwest adjustment
+0.3How legislative races in the region have run against lean and environment lately
← RepublicanDemocratic →Lean + environmentUsual vote, shifted by 58% of the environment andthe Midwest adjustmentD+3.7Fundamentals modelAdds incumbency, past results, money andexperienceD+5.7Polls in similar placesPolling of similar races in South Dakota andlook-alike placesD+5.8Polling averageNo polls of this racenot availableHorizon forecastPolls + fundamentals, projected to Election DayD+5.8Pulse forecastPolls (and polling of similar places) only, todayD+1.5

Each estimate is a margin before national and statewide uncertainty is simulated. Horizon blends polls, fundamentals and a little of the similar-places estimate, weighting each by how precise it is; Pulse uses polls and similar places only.

Fundamentals inputs
Incumbency (+1 D, −1 R)0
Fundraising edge (log ratio of individual money)-0.05
Elected-experience edge0
First-term incumbent0
Seat's last result vs. expectation10.44
Incumbent's last result vs. expectation0

Polls

No public polls of this race. The forecast relies on fundamentals and on polling of similar places in the state.

The district

Lean R+4: how much more Democratic or Republican than the nation it votes for president.

Presidential vote

← RepublicanDemocratic →2016 presidentD+2.7D+0.4 vs. nation2020 presidentR+1.7R+6.2 vs. nation2024 presidentR+0.2D+1.3 vs. nation

Precinct results re-aggregated to the current district lines.

Who lives here

Population
28,131
People per km²
2
Adults with a B.A.+
17%
White, no degree
33%of adults
  • White 36%
  • Hispanic 3%
  • Other / multiracial 60%

American Community Survey 2020–2024, aggregated from census tracts.

Past results

Results in the same-numbered district; earlier elections may have used different lines.

2024

7,325 votes · D+3.9
✓ Red Dawn Foster (D)52.0%
Anthony G Kathol (R)48.0%

2024 President Vote in this district

7,338 two-party votes · R+0.2 · D+1.3 vs. the nation
✓ Donald Trump (R)50.1%
Kamala Harris (D)49.9%

2022

6,179 votes · D+2.9
✓ Red Dawn Foster (D)51.4%
David Jones (R)48.6%

2020 Earlier district lines

6,807 votes · D+12.5
✓ Red Dawn Foster (D)56.3%
Judd W Schomp (R)43.7%

2020 President Vote in this district

9,702 two-party votes · R+1.7 · R+6.2 vs. the nation
✓ Donald Trump (R)50.8%
Joe Biden (D)49.2%

2016 President Vote in this district

7,131 two-party votes · D+2.7 · D+0.4 vs. the nation
✓ Hillary Clinton (D)51.3%
Donald Trump (R)48.7%