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

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Kansas › U.S. House of Representatives · November 3, 2026 · Updated Oct 16, 2026

Kansas's 1st District

Mann is very likely to win: Mann wins in more than 99 of every 100 simulations.

Reinhold (D)
<1%
chance of winning
Mann (R)
>99%
Average margin
R+21.5
80% of outcomes
R+30 to R+13
Partisan lean
R+29
Polls
No pollsmodel only

Mann is very likely to win: Mann wins in 49 of every 50 simulations.

Reinhold (D)
2%
chance of winning
Mann (R)
98%
Average margin
R+20.6
80% of outcomes
R+32 to R+9
Partisan lean
R+29
Polls
No pollsmodel only

Range of outcomes

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

R+21.5R+40R+20EvenD+20D+40
R+20.6R+40R+20EvenD+20D+40

How the odds have moved

Chance of winning by forecast date.

0%25%50%75%100%AugSepOctNovNov 3Reinhold <1%Mann >99%

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

0%25%50%75%100%AugSepOctNovNov 3Reinhold 2%Mann 98%

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

The candidates

Democratic

Lauren Reinhold

Former federal employee

Experience
No elected office
Raised
$48.3K
From individuals
$43.7K
Spent
$43.5K
Cash on hand
$4.8K

Money: FEC, through Jul 15, 2026.

Profile and career

RepublicanIncumbent

Tracey Mann

Incumbent U.S. representative

Experience
Statewide office or Congress
Raised
$1.8M
From individuals
$387.1K
Spent
$607.8K
Cash on hand
$2.9M

Money: FEC, through Sep 30, 2026.

Profile and career · Wikipedia

What goes into the forecast

Every ingredient's estimate of the final margin.

National environment
D+9.5Election Day forecast; federal races run in it
Swing reaching this office
78%Of a shift in the environment, from past House races since 2016
Midwest adjustment
+1.4How House races in the region have run against lean and environment lately
← RepublicanDemocratic →Lean + environmentUsual vote, shifted by 78% of the environment andthe Midwest adjustmentR+19.8Fundamentals modelAdds incumbency, past results, money andexperienceR+22.0Polls in similar placesPolling of similar races in Kansas and look-alikeplacesR+20.1Polling averageNo polls of this racenot availableHorizon forecastPolls + fundamentals, projected to Election DayR+21.5Pulse forecastPolls (and polling of similar places) only, todayR+20.6

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)-1
Fundraising edge (log ratio of individual money)-1.55
Elected-experience edge-1
First-term incumbent0
Seat's last result vs. expectation-6.93
Incumbent's last result vs. expectation-6.93

Polls

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

The district

Lean R+29: how much more Democratic or Republican than the nation it votes for president.

Presidential vote

← RepublicanDemocratic →2016 presidentR+37.2R+39.5 vs. nation2020 presidentR+27.7R+32.2 vs. nation2024 presidentR+31.9R+30.4 vs. nation

Precinct results re-aggregated to the current district lines.

Who lives here

Population
724,340
People per km²
6
Adults with a B.A.+
30%
White, no degree
53%of adults
  • White 75%
  • Hispanic 16%
  • Black 3%
  • Asian 2%
  • Other / multiracial 5%

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

304,458 votes · R+38.3
✓ Tracey Mann (R)69.1%
Paul Buskirk (D)30.9%

2024 President Vote in this district

305,322 two-party votes · R+31.9 · R+30.4 vs. the nation
✓ Donald Trump (R)65.9%
Kamala Harris (D)34.1%

2022

238,425 votes · R+35.3
✓ Tracey Mann (R)67.7%
JAMES “JIMMY” BEARD (D)32.3%

2020 Earlier district lines

292,622 votes · R+42.3
✓ Tracey Mann (R)71.2%
Kali Barnett (D)28.8%

2020 President Vote in this district

337,720 two-party votes · R+27.7 · R+32.2 vs. the nation
✓ Donald Trump (R)63.9%
Joe Biden (D)36.1%

2018 Earlier district lines

224,640 votes · R+36.3
✓ Roger Marshall (R)68.1%
Alan Lapolice (D)31.9%

2016 Earlier district lines

257,971 votes · Uncontested by the other party
✓ Roger Marshall (R)65.9%
Alan Lapolice (I)26.3%
Kerry Burt (L)7.5%

2016 President Vote in this district

277,246 two-party votes · R+37.2 · R+39.5 vs. the nation
✓ Donald Trump (R)68.6%
Hillary Clinton (D)31.4%