VotePredictor
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Illinois District 12 election, 2026

Julie Fortier vs. Mike Bost. Today's article: every forecast for this race →

VotePredictor forecast
Mike Bost favored
Safe R · predicted margin R+35.5
99%
chance to win
2024 presidential margin
R+43.0
2026 national environment
D+8.0
District polls
none
Forecast spread
±6.6 points

Margin from the district's presidential lean on its 2026 lines, one fitted intercept and the national environment as a uniform swing; the win probability adds a decaying incumbency premium (Republican incumbent running). No district poll is blended in.

Democratic

Julie Fortier

Major-party general-election nominee.

Polls

No district-level 2026 general-election poll is currently in VotePredictor's verified polling feed for IL-12. The forecast above is the model alone: lean, incumbency and the national environment.

Campaign money

FEC reports through October 14, 2026
Mike BostREP · incumbent$1.6M raised
Spent $1.1MCash on hand $845k3% from donors under $200
Top contributors, industries and states

Industries

  1. Not Reported$79k
  2. Self-Employed & Freelance$28k
  3. Transportation & Logistics$24k
  4. Legal & Professional Services$20k
  5. Government Relations and Lobbying Services$14k

States

  1. IL$340k
  2. FL$39k
  3. DC$29k
  4. VA$17k
  5. CT$17k
Every contribution on GovMoneyGraph ↗
Julie FortierDEM$162k raised
Spent $128kCash on hand $34k45% from donors under $200
Top contributors, industries and states

Industries

  1. Unemployed$31k
  2. Retired$20k
  3. Nonprofit, Labor & Civil Society$5k
  4. Self-Employed & Freelance$3k
  5. Healthcare & Pharmaceuticals$1k

States

  1. IL$66k
  2. MO$2k
  3. WA$250
Every contribution on GovMoneyGraph ↗

What each candidate's own campaign committees reported for the 2025–26 cycle; outside spending by PACs and parties is not included. Industries are classified from donors' reported employers. The House forecast's win probability reads the two nominees' shares of individual contributions shown here, a small term that never moves the predicted margin. Data: GovMoneyGraph, based on FEC records.

Other forecasts

We have not yet ingested a district rating from these independent forecasters for IL-12; links go to their current national House ratings. Missing is shown as missing—not converted into a probability.

Past results

Every election in Illinois's 12th district we hold a result for. District numbers are reused across redistricting, so older rows may cover different ground than the seat does today.

YearWinnerMargin
2014Mike Bost(R)R+10.6

Candidate news

Candidate field source: 2026 House election roster ↗

Nearby in the directory: IL-11 · IL-13