Democratic Sweep Chances Jump 20 Points Since Iran War Began: Crypto Prediction Market Puts Party's Odds at 60%

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Prediction-market traders are increasingly pricing in a Democratic takeover of both chambers of Congress, with Polygon (CRYPTO: POL)-based Polymarket putting the odds of a 2026 midterm sweep at a record 60% as Election Day approaches.

Prediction Markets Shift Ahead of 2026 Midterms

Market commentator The Kobeissi Letter highlighted the data, saying, "Just one year ago, there was a mere 22% chance of a Democrat sweep, with odds up 20 percentage points since the Iran War began. Election day is 47 days out."

BREAKING: Market expectations for a Democrat "sweep" in the 2026 Midterm elections surge to a record high 60% chance.

Just one year ago, there was a mere 22% chance of a Democrat sweep, with odds up 20 percentage points since the Iran War began.

Election day is 47 days out. pic.twitter.com/hYkLYI5rFZ

— The Kobeissi Letter (@KobeissiLetter) September 17, 2026

Military action in Iran began in February. Although the strikes pushed oil prices higher, the stock market has remained resilient.

President Donald Trump is reportedly scheduled to meet with Gulf leaders next week to discuss the next phase of the Iran war.