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?

Iowa › Iowa State Senate · November 3, 2026 · Updated Oct 16, 2026

Iowa State Senate District 23

Enos is favored to win: Enos wins in about 3 of every 4 simulations.

Thompson (D)
27%
chance of winning
Enos (R)
73%
Average margin
R+4.3
80% of outcomes
R+14 to D+5
Partisan lean
R+16
Polls
No pollsmodel only

Enos is clearly favored to win: Enos wins in 5 of every 6 simulations.

Thompson (D)
17%
chance of winning
Enos (R)
83%
Average margin
R+9.1
80% of outcomes
R+22 to D+4
Partisan lean
R+16
Polls
No pollsmodel only

How this race is decided

Staggered Senate

Senators serve four-year terms; half the seats are on the ballot each election.

Range of outcomes

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

R+4.3R+20R+10EvenD+10D+20
R+9.1R+40R+20EvenD+20D+40

How the odds have moved

Chance of winning by forecast date.

0%25%50%75%100%AugSepOctNovNov 3Thompson 27%Enos 73%

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

0%25%50%75%100%AugSepOctNovNov 3Thompson 17%Enos 83%

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
Iowa state offices
+1.4Polls for governor, statewide and legislative races · details
Environment here
D+10.9Used 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 adjustmentR+6.2Fundamentals modelAdds incumbency, past results, money andexperienceR+4.7Polls in similar placesPolling of similar races in Iowa and look-alikeplacesR+4.1Polling averageNo polls of this racenot availableHorizon forecastPolls + fundamentals, projected to Election DayR+4.3Pulse forecastPolls (and polling of similar places) only, todayR+9.1

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)0.21
Elected-experience edge0
First-term incumbent0
Seat's last result vs. expectation1.28
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+16: how much more Democratic or Republican than the nation it votes for president.

Presidential vote

← RepublicanDemocratic →2016 presidentR+21.2R+23.4 vs. nation2020 presidentR+13.7R+18.2 vs. nation2024 presidentR+16.7R+15.2 vs. nation

Precinct results re-aggregated to the current district lines.

Who lives here

Population
79,879
People per km²
65
Adults with a B.A.+
48%
White, no degree
46%of adults
  • White 86%
  • Hispanic 5%
  • Black 3%
  • Asian 3%
  • Other / multiracial 3%

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 President Vote in this district

41,266 two-party votes · R+16.7 · R+15.2 vs. the nation
✓ Donald Trump (R)58.3%
Kamala Harris (D)41.7%

2022

29,461 votes · R+17.4
✓ Jack Whitver (R)58.6%
Matt Pries (D)41.3%

2020 President Vote in this district

36,151 two-party votes · R+13.7 · R+18.2 vs. the nation
✓ Donald Trump (R)56.9%
Joe Biden (D)43.1%

2018 Earlier district lines

25,434 votes · Uncontested by the other party
✓ Herman C Quirmbach (D)74.8%
Eric Cooper (L)24.7%
Writein (—)0.6%

2016 President Vote in this district

26,364 two-party votes · R+21.2 · R+23.4 vs. the nation
✓ Donald Trump (R)60.6%
Hillary Clinton (D)39.4%

2014 Earlier district lines

19,807 votes · D+18.3
✓ Herman C Quirmbach (D)59.1%
Jeremy Davis (R)40.9%