▢ POLICY & LAW 3 MONTHS HORIZON RESOLVES 3 NOV 2026 · in 5d

The Democratic Party wins majorities in both the US Senate and House of Representatives in the 2026 midterms.

A unified Democratic Congress hinges on the November 2026 congressional midterms. Resolves as yes if the Democratic Party wins control of both the Senate and the House of Representatives.

Across 4 frontier models answering independently, the panel thinks this is unlikely: the median is 22%.

They broadly agree, 24 points between GPT at 38% and DeepSeek at 14%.

Money disagrees. The market sits at 66%, so the models are 44 points less confident than people with cash on the outcome — one of the wider gaps in the archive.

Nothing is settled until 3 Nov 2026, when the outcome is checked against sources and every number above gets a permanent score.

WHAT THE MONEY SAYS Polymarket ↗
66%market price
AI edge
-44 pts
Moved this week
+2 pts
Since we asked
+13 pts
Volume
$8.8M

The models are sharply less confident than traders risking real money: 22% against 66%.

MODEL BY MODEL

What each one said

  • GPTOpenAI

    Midterm backlash favors Democrats in the House, but the Senate map makes a double flip materially harder.

    openai/gpt-5.6-terra · asked 14 Sept 2026
    38%
  • ClaudeAnthropic

    Senate map badly favors GOP; House flip likely but Senate very unlikely for Dems

    anthropic/claude-sonnet-5 · asked 14 Sept 2026
    22%
  • GeminiGoogle

    Flipping the House is favorable, but netting the 4 Senate seats needed against Collins and Tillis is tough.

    google/gemini-3.8-flash · asked 14 Sept 2026
    21%
  • DeepSeekDeepSeek

    Senate map is brutal for Dems; House tossup.

    • Both flipping is a long shot.
    deepseek/deepseek-v4.1-flash · asked 14 Sept 2026
    14%
  • GrokxAI
    no answer this run x-ai/grok-4.6 · asked 14 Sept 2026
    –
  • QwenAlibaba
    no answer this run qwen/qwen3.8-max-0902 · asked 14 Sept 2026
    –

4 of 6 models answered · 24 points between the highest and lowest. None was shown the market price.

Resolution criteria

This market will resolve according to the party that wins control of the United States Senate and the party that wins control of the United States House of Representatives in the 2026 United States midterm election. A party wins control of the United States Senate if it wins a majority of the chamber’s voting seats. If no party wins a majority of voting seats, the party that wins control of the chamber is the party that wins half of the voting seats and holds the Vice Presidency. If the outcome remains ambiguous after applying the above criteria, the chamber will be deemed controlled by the party with which the first selected President Pro Tempore of the Congress that convenes after the specified election is affiliated. A party wins control of the United States House of Representatives if it wins a majority of the chamber’s voting seats. If no party wins a majority of voting seats, the chamber will be deemed controlled by the party with which the first elected Speaker of the House of the Congress that convenes after the 2026 midterm election is affiliated. The following rules govern the counting of seats for determining which party wins control of the chambers. For determining

Original market ↗

WHAT DO YOU THINK?
loading…

Question sourced from Polymarket on 14 Sept 2026. Forecast by google/gemini-3.8-flash, anthropic/claude-sonnet-5, openai/gpt-5.6-terra, x-ai/grok-4.6, deepseek/deepseek-v4.1-flash, qwen/qwen3.8-max-0902 via OpenRouter.