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Events
GroupKALSHIPOLYMARKETCross-Platform

2026 Midterms: House Popular Vote Margin of Victory

2026 Midterms: House Popular Vote Margin of Victory
Vol

PM $178.7K · K 4.17M contracts

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Events

3

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Markets

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)PolymarketKalshiGap
Democrats 8-10%Same question, fine print differs28%28.5%0.5 pts
Democrats 10-12%Same question, fine print differs22%24.5%2.5 pts
Democrats 6-8%Same question, fine print differs16%14.5%1.5 pts
Democrats 12-14%Same question, fine print differs15.6%13.5%2.1 pts
Democrats 4-6%Same question, fine print differs5%5.1%0.1 pts
Democrats 14-16%Same question, fine print differs4.4%4.5%0.1 pts
Democrats 16%+Same question, fine print differs3.9%3.6%0.3 pts
Democrats 2-4%Same question, fine print differs3.9%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.

Prices are catalog snapshots and may have changed. Check each market's rules and observation time.

KalshiPolitics
2026 Midterms: House popular vote vs. generic ballot?

2026 Midterms: House popular vote vs. generic ballot?

K 7.6K contracts
Will Democrats outperform the final VoteHub generic ballot margin by 1 to 2.9 points in the 2026 House popular vote?Yes 30.5%
Will the 2026 House popular vote margin be within 0.9 points of the final VoteHub generic ballot margin?Yes 26.5%
Will Democrats outperform the final VoteHub generic ballot margin by 3 to 4.9 points in the 2026 House popular vote?Yes 12%
+6 moreNext deadline May 30, 2027 UTC
PolymarketPolitics
NZ Election: Popular Vote Margin of Victory?

NZ Election: Popular Vote Margin of Victory?

PM $24.9K
Will Labour Party win the popular vote in the 2026 New Zealand legislative election by 0-5%?Yes 45%
Will National Party win the popular vote in the 2026 New Zealand legislative election by 0-5%?Yes 41%
Will National Party win the popular vote in the 2026 New Zealand legislative election by 5-10%?Yes 7.8%
+5 moreNext deadline Nov 8, 2026 UTC
KalshiPolitics
Closest House race in 2026?

Closest House race in 2026?

K 0 contracts
Will PA-01 have the smallest margin of victory in the November 3, 2026 U.S. House general elections?Yes 4.2%
Will CO-03 have the smallest margin of victory in the November 3, 2026 U.S. House general elections?Yes 4.2%
Will AZ-02 have the smallest margin of victory in the November 3, 2026 U.S. House general elections?Yes 4.2%
+31 moreNext deadline Jan 10, 2027 UTC
KalshiPolitics
LA-05 House election: Dan McKay vote percent (1st Round)

LA-05 House election: Dan McKay vote percent (1st Round)

K 31.4K contracts
Will Dan McKay receive at least 2% of the popular vote in the first round of the 2026 LA-05 House election?Yes 97%
Will Dan McKay receive at least 4% of the popular vote in the first round of the 2026 LA-05 House election?Yes 96%
Will Dan McKay receive at least 5% of the popular vote in the first round of the 2026 LA-05 House election?Yes 89.5%
+15 moreNext deadline Nov 3, 2027 UTC
KalshiPolitics
LA-03 House election: Caleb Walker vote percent (1st Round)

LA-03 House election: Caleb Walker vote percent (1st Round)

K 22.0K contracts
Will Caleb Walker receive at least 2% of the popular vote in the first round of the 2026 LA-03 House election?Yes 97%
Will Caleb Walker receive at least 4% of the popular vote in the first round of the 2026 LA-03 House election?Yes 96.5%
Will Caleb Walker receive at least 6% of the popular vote in the first round of the 2026 LA-03 House election?Yes 82%
+14 moreNext deadline Nov 3, 2027 UTC
KalshiPolitics
LA-04 House election: Matt Gromlich vote percent (1st Round)

LA-04 House election: Matt Gromlich vote percent (1st Round)

K 17.9K contracts
Will Matt Gromlich receive at least 4% of the popular vote in the first round of the 2026 LA-04 House election?Yes 97.5%
Will Matt Gromlich receive at least 6% of the popular vote in the first round of the 2026 LA-04 House election?Yes 94%
Will Matt Gromlich receive at least 8% of the popular vote in the first round of the 2026 LA-04 House election?Yes 76.5%
+13 moreNext deadline Nov 3, 2027 UTC

Market Insights

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.