Elections Intelligence

Illinois 12th District

DEFENDED SEATSafe R

Mike Bost (R) has held this seat since 2015 and is running for re-election. Before that: William L. Enyart (D).

Julie Fortier Challenger
3.6¢
Party market · checked 2:09 PM ETView on Kalshi ↗
98¢
Mike Bost Incumbent

FTP Race Signal

FTP Race SignalA composite of market, polling and money. The prediction-market price anchors it; a polling average moves it: the last 30 days, or the three most recent pollsters when fewer polled. Polls paid for by a candidate, party or allied group move 2 points toward the other side and count half. When the three most recent independent pollsters each have the race within three points, it is a Toss-up unless the market is already decisive. Fundraising counts only at a five-to-one gap. Past results are context, not inputs. A rating changes only when the evidence clears the line.

The market prices this seat about where its history left it: a 48-point Republican hold in 2024, priced at 98¢ today.

Safe R
Safe DLikely DLean DToss-upLean RLikely RSafe R
Fundraising · Lean RR 15.07-to-1 in receipts. Market · Safe RR 98¢: traders' price for a Republican hold. Prior result · Safe RR+48.4 in 2024.

No public polls. The market favors Bost.

The market moved 3¢ toward the Republican in the last 7 days. As of October 12.

Market

BandPRICEToss-up50¢ to 65¢Lean65¢ to 82¢Likely82¢ to 95¢Safe95¢ and above
R 98¢

Kalshi party market · checked 2:09 PM ET

View market on Kalshi ↗

Polling

BandPOINTSToss-up0 to 5Lean5 to 10Likely10 to 20Safe20 and above
—

Prior result

BandPOINTSToss-up0 to 5Lean5 to 12Likely12 to 25Safe25 and above
R+48.4

Mike Bost (R)

74.2% to 25.8% · 2024 general election

def. Brian Roberts (D). Margin verified against retrieved official results.

Fundraising

BandRATIO TO 1Parity1 to 5Lean5 and above
R 15.07 to 1

Raised 2025 to 2026 · thru Jun 30

Julie Fortier$88.1K ↗$59.8K cash
Mike Bost$1.33M ↗$790.0K cash

Total receipts in the 2025 to 2026 two-year cycle, through June 30, 2026.

The general election is on November 3, which is 22 days away.