Will Democrats win the US Senate in the 2026 midterms by Nov 10?
Posted 2026-08-17 — 85 days before the deadline, stated before the outcome.
The United States Senate is the upper chamber of the federal legislature, where each state holds two seats. Control of the chamber shifts based on the results of midterm elections, which occur every two years to determine the balance of power between the major political parties.
The claim
The Democratic Party wins control of the US Senate in the 2026 midterm elections, with the outcome called by 2026-11-10.
Reasoning trace
- Core question: us_midterms_senate (instance 1)
Evidence so far
21 confirming · 13 denying signals · 7 verified · 5 broken assumptions. The evidence itself is part of the full dossier.
Probability history
Updated 37 times since mint (last on 2026-11-05) — 75% at mint → 84% today.
What to watch
- leading indicator National Senate favorability polls show Democrats maintaining a net advantage or parity with Republicans in the months leading up to the election (Q3-Q4 2026) observed
- precondition Republican Senate candidates fail to secure nominations in at least three seats currently held by Democrats where Republicans have a realistic chance of pickup
The full dossier behind this prediction — the evidence trail, the risk analysis, the monetization scenarios — is available on request: [email protected].
Probabilities are calibrated against the system's own resolved history; after the deadline the outcome is resolved and audited — including the calls we get wrong. Nothing on this page is investment advice.