
2026 Midterms: House Popular Vote Margin of Victory
PM $178.7K · K 4.17M contracts
3
36
2026 Midterms: House Popular Vote Margin of Victory

PM $178.7K · K 4.17M contracts
3
36
Polymarket vs Kalshi
Snapshot from
As of Oct 31, 2026, 9:00 AM UTC, Democrats 8-10% is priced at 28% on Polymarket and 28.5% on Kalshi.
| Outcome (Yes price) | Polymarket | Kalshi | Gap |
|---|---|---|---|
| Democrats 8-10%Same question, fine print differs | 28% | 28.5% | 0.5 pts |
| Democrats 10-12%Same question, fine print differs | 22% | 24.5% | 2.5 pts |
| Democrats 6-8%Same question, fine print differs | 16% | 14.5% | 1.5 pts |
| Democrats 12-14%Same question, fine print differs | 15.6% | 13.5% | 2.1 pts |
| Democrats 4-6%Same question, fine print differs | 5% | 5.1% | 0.1 pts |
| Democrats 14-16%Same question, fine print differs | 4.4% | 4.5% | 0.1 pts |
| Democrats 16%+Same question, fine print differs | 3.9% | 3.6% | 0.3 pts |
| Democrats 2-4%Same question, fine print differs | 3.9% | 2.8% | 1.0 pts |
Yes prices for outcomes an automated review found to ask the same question on both platforms. They are not order quotes; check each platform's rules, fees and live prices before trading.
AI Analysis
Trader mode: Market mechanics, assumptions and risks
PM $178.7K · K 4.17M contracts
Reported volume · provider units
36
Saved contracts
10
Same-question pairs
Source snapshot: Oct 31, 2026, 9:00 AM UTC
About This Event
This market will resolve according to the popular vote margin of victory between the Democratic Party and the Republican Party in the US House of Representatives midterm elections, scheduled for November 3, 2026. For the purpose of this market, the “popular vote margin of victory” is defined as the absolute difference between the percentage of valid votes cast for all Democratic Party House candidates and the percentage of valid votes cast for all Republican Party House candidates in this election. The percentage of the valid votes cast for each party’s House candidates will be determined by dividing the total number of valid votes that party’s House candidates receive by the sum of all valid votes cast for U.S. House candidates in the election. Only votes cast for candidates for U.S. Representative (voting members of the House of Representatives from districts in the 50 states) will be considered; votes for Delegates and the Resident Commissioner will not be considered. If the reported value falls exactly between two brackets, then this market will resolve to the higher range bracket. This market will resolve based on the vote totals as published by the US Clerk of the House. Any recount included in the Clerk of the House’s publication will be considered. If the US House of Representatives midterm elections do not take place by June 30, 2027, 11:59 PM ET, this market will resolve to "Other". The resolution source for this market will be 2026 midterm election results published by the US Clerk of the House (https://history.house.gov/Institution/Election-Statistics/). If the 2026 midterm elections take place, and the Clerk of the House does not publish the results of this election by June 30, 2027, 11:59 PM ET, another credible resolution source may be chosen.
AI-generated analysis based on market data. Not financial advice.
AI-written background. References identify the evidence used; Wikipedia links under Learn More are additional reading. Prices and provider rules are dated snapshots. This is not financial advice.
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Price gaps of 2 pp+
2
Same-question pairs
10
Largest saved gap: 2.5 percentage points.
Price differences do not establish arbitrage. Check each pair's review, current order prices, fees and settlement rules.

