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U.S. House · All Wisconsin races

Wisconsin District 1

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Republicans hold this seat today (current holder); Democrats are favored: 54 in 100 that it changes hands.

Mitchell Berman
Democratic
54 in 100
50–50chance of winning, out of 100
Bryan Steil
Republican · incumbent
46 in 100

Mitchell Berman wins in 54 of 100 simulations.

The polling average has Mitchell Berman +0.8 across 2 polls; partisan lean, the national environment and incumbency point to Bryan Steil +0.3. Polls get 61% of the weight 15 days out.

Where the result could land

Every simulated outcome, grouped in 2-point steps. Projected margin Berman +0.3; 80 in 100 fall between Steil +4.3 and Berman +4.9.

Steil +30Steil +20Steil +10Berman +10Berman +20Berman +30Tie

The candidates

Mitchell Berman
Democratic
Raised
$1.6M
Cash on hand
$338K
Through 2026-09-30
No biography on file yet.
Bryan SteilIncumbent
Republican · American politician (born 1981)

Bryan George Steil is an American attorney, businessman, and Republican politician from Janesville, Wisconsin. He is a member of the United States House of Representatives, representing Wisconsin's 1st congressional district since 2019. Since 2023, he has served as chair of the House Administration Committee. Wikipedia

Raised
$6.3M
Cash on hand
$4.2M
Through 2026-09-30
Official website ↗

Ballot list and short bios from Wikipedia (CC BY-SA); websites from Wikidata; fundraising from the FEC (cycle-to-date, latest report).

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Polls

The polling average stands at Berman +0.8 across 2 polls testing Mitchell Berman against Bryan Steil.

Berman +0.8 since Sep 23, 2026
Steil +10Steil +5EvenBerman +5Berman +10Sep 27Oct 4Oct 11Oct 18

Line: weighted average after adjustments; band: 95% range of the average; dots: individual polls after adjustments.

PollsterDatesSampleResultAdjustedWeight
Impact ResearchC+ · DEM sponsor
for House Majority PAC
Sep 28–Oct 1500 LVBerman +1.0Berman +1.20.22
DCCC Targeting and Analytics DepartmentC+ · DEM sponsorSep 21–Sep 23495 LVBerman +0.0Berman +0.20.19

Chance of winning over time

How this race’s odds have moved as polls and the national environment changed.

Berman +23 over the past 3 months
020406080100Aug 1Sep 1Oct 1

Out of 100. Today: Berman 54, Steil 46.

What’s driving the forecast

The model blends each estimate by how much to trust it right now. Polls get 61% of the weight, 15 days out.

Polling average (after adjustments)Berman +0.8±4.9 sampling range; effective 2 polls
Partisan lean (Cook PVI, 2026 lines) R+2.0roughly 4 points of margin vs. the nation
National environment D+9.6generic ballot + presidential approval
Incumbent’s track record Steil +0.8In 2024 they ran 1.7 pts more Republican than the state’s lean predicted; half carries over (max 10)
IncumbencySteil +3.6incumbent’s side
Fundamentals estimateSteil +0.3±6 typical error
Expert ratings (average)—used only in the “+ Expert ratings” version
ForecastBerman +0.3±3.5 standard deviation, including 2.3 for movement before Election Day

All three versions

  • Polls only: Mitchell Berman 57 in 100 (Toss-up)
  • Polls + fundamentals: Mitchell Berman 54 in 100 (Toss-up)
  • Polls + fundamentals + experts: Mitchell Berman 54 in 100 (Toss-up)

Rules and notes

  • Incumbent renominated

House races, closest first · this is #2 of 421