Updated Oct 16, 2026, 1:45 PM ET
House · 3 November 2026

IL-08 House 2026

94.7% DMelissa Bean leads TruthIndex™Safe D
Polymarket
95.0%
Kalshi
94.5%
Spread
0.4 pts
24h
–
7 days
+1.4
Updated
Oct 16, 2026, 1:45 PM ET
Latest coverage

Live News

Recent coverage for IL-08 House.

  1. Former U.S. Rep. Melissa Bean seeks return to Congress in race vs. Republican Jennifer Davis - CBS Chicago

    The CBS Chicago article covers former U.S. Rep. Melissa Bean seeking to return to Congress in Illinois’ 8th District, challenging Republican Jennifer Davis.

  2. Race for Congress: Melissa Bean vs. Jennifer Davis in Illinois' 8th District - CBS Chicago

    Jennifer Davis is a candidate in Illinois' 8th Congressional District race. The CBS Chicago feature discusses the contest to succeed Raja Krishnamoorthi, who is stepping down after his term.

    CBS NewsDavis
  3. Who is running for the U.S. House in the Chicago area during the 2026 midterm elections? - CBS Chicago

    The page appears to discuss who is running for the U.S. House in the Chicago area for the 2026 midterms, including information on candidates and elections in various districts.

  4. Full interview with Jennifer Davis, candidate for Illinois 8th Congressional District - CBS Chicago

    Jennifer Davis, Republican candidate for Illinois’ 8th Congressional District, discusses her candidacy and priorities in a full CBS Chicago interview with reporter Chris Tye.

    CBS NewsDavis

Melissa Bean, last 60 days

How to read this chart

The green line is the TruthIndex™, the chance of this outcome. It combines the prices on both venues and gives more weight to the venue with more money in its order book. The two thinner lines are Polymarket's and Kalshi's own prices, and the grey band between them shows how far apart the two venues are.

The pale bands behind the lines are the rating zones (Toss-up, Lean, Likely and Safe), so you can see when the race moved from one rating to another. Move along the chart, or use the arrow keys, to read the values for each day.

More in Methodology
TruthIndex™PolymarketKalshiGap between the venuesRating zones

All outcomes

OutcomeTruthIndex™PolymarketKalshiSpread24h
DMelissa Bean 94.7% 95.0% 94.5% 0.4 pts –
RJennifer Davis 5.0% 5.0% 4.6% 0.4 pts –

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<p style="margin:4px 0 0;font:12px/1.4 Arial,sans-serif">Live odds: <a href="https://midterms.nijinn.io/house/il-08/?utm_source=embed&amp;utm_medium=embed-credit&amp;utm_campaign=midterms-2026&amp;utm_content=house-il-08">Nijinn US Midterms 2026</a></p>

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Candidates & Background

Jennifer Davis

Republican

Jennifer Davis, a Republican service technology company founder, faces Democrat Melissa Bean, a former U.S. representative, for Illinois's open 8th congressional district seat in 2026.

Melissa Bean

Melissa Bean

Democratic

Melissa Bean, a Democrat who represented Illinois's 8th congressional district from 2005 to 2011, is her party's nominee for the open 8th district seat in 2026 against Republican Jennifer Davis, a service technology company founder.

Born 1962 · Chicago, Illinois

Margin of victory

Each venue's margin market, shown on its own: the two venues set their ranges differently.

Kalshi4.1K contracts

Illinois's 8th District margin of victory

Bean, 3+ pts
94.0%
Bean, 6+ pts
89.1%
Bean, 9+ pts
80.5%
Bean, 12+ pts
78.0%
Bean, 15+ pts
66.0%
Bean, 18+ pts
52.0%
implied
Bean, 21+ pts
40.0%
implied
Bean, 24+ pts
27.0%
Bean, 27+ pts
14.5%
Source: Kalshi market

Polymarket$17.2K traded

IL-08 House Election Margin of Victory

Republican Wins
1.6%
Democrat 0-5%
0.5%
Democrat 5-10%
5.5%
Democrat 10-15%
4.3%
Democrat 15-20%
18.5%
Democrat 20-25%
27.5%
Democrat 25-30%
35.0%
Democrat 30-35%
3.2%
Democrat 35%+
0.6%
Source: Polymarket market

Each venue's market

Polymarket$22.1K traded

Prices which party wins.

Melissa Bean: Counted · bid 94.0% / ask 96.0% · $662 within 5 pts

This market will resolve according to the party of the candidate who wins the IL-08 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026. ​A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 House elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democrat or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the House elections are conclusively called by this market's resolution sources. This market will resolve based on the result of the election as indicated by a consensus of credible reporting. If there is ambiguity, this market will resolve based solely on the official results as reported by the United States government, specifically the Federal Election Commission (https://www.fec.gov/).

Full rules on Polymarket

Kalshi8.4K contracts traded

Prices which party wins.

Melissa Bean: Counted · bid 93.3% / ask 95.8% · $1.5K within 5 pts

Contract shown: Melissa Bean

If the House member sworn in for IL-08 for the term beginning in 2027 is a member of the Democratic Party, then the market resolves to Yes.

This market is eligible for accelerated determination after a consensus of media organizations project the winner. See full rules for details.

Full rules on Kalshi