Background, methodology, and platform context
Compare 2026 US House of Representatives Control prediction market odds side by side across Polymarket, Kalshi. Platforms show similar odds, with an average spread of just 0.0pp. Close agreement often signals strong market consensus. With $10.83M in combined trading volume across 13 outcomes, this is one of the most actively traded cross-platform prediction markets.
Descriptions normalized for comparison (outcome names replaced with [OUTCOME])
This market will resolve according to the party that controls the House of Representatives following the 2026 U.S. House elections scheduled for November 3, 2026. House control is defined as having more than half of the voting members of the U.S. House of Representatives. If the outcome of this election is ambiguous given the above rules, this market will remain open until the Speaker of the House is selected following the 2026 U.S. general election, at which point it will resolve to the party the Speaker is affiliated with at the time of their election to that position. If the elected Speaker does not caucus with any listed party this market will resolve “Other”. Determination of which party controls the House after the 2026 U.S. House elections will be based on a consensus of credible reporting, or if there is ambiguity, final federal and/or state election authority certification or other final official determination of the 2026 election results.
If the Republican Party has between [OUTCOME] House seats on Feb 1, 2027, then the market resolves to Yes.
Individuals caucusing with the Republicans will be included
Different platforms may use different resolution criteria, data sources, and settlement timelines.
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