Democrats win the Michigan Senate race in 2026 priced at 68.5% on Polymarket, down 3.5 points, on $1.5M traded

The Polymarket contract on Democrats winning the Michigan Senate race in 2026 was priced at 68.5%, down 3.5 probability points, with $1.5M traded, in the supplied update published Oct 25, 2026 at 11:24 PM ET.

According to PredictionBubbles, the Michigan contract appeared among declining political markets on its movers board. The price still put a Democratic victory above an even chance, despite the downward repricing.

How the move is measured

PredictionBubbles ranks contracts by the size of their probability-point changes over 24 hours, rather than their relative percentage changes. Its board draws prices from Polymarket and Kalshi and updates every 15 minutes; the supplied page identifies its venue-data snapshot as 26 Oct 2026, 03:07 UTC.

The scanner covers 1,995 markets lasting longer than 14 days, excluding same-week fixtures. Only open contracts with a valid day-earlier comparison qualify for ranking. Trading volume and liquidity provide context but do not determine a contract’s position on the board.

What the data does not establish

The supplied material does not identify a poll, campaign development or other event behind Michigan’s decline. PredictionBubbles describes several possible drivers of market moves, including news, orders in thin markets and traders responding to one another, but does not establish which applied here.

The $1.5M traded figure adds activity context, but the supplied Michigan update does not specify its measurement period or provide order-book depth. It therefore does not establish how much trading accompanied the 3.5-point decline.

What it means for prediction markets

• Direction and level differ: Democratic victory remained the more likely outcome in the contract’s pricing at 68.5%, even as its implied probability fell.
• The change is in points: The reported decline is 3.5 probability points over the board’s 24-hour comparison window, not a 3.5% relative decrease.
• Cause remains unverified: The listing documents a repricing, not evidence of a particular electoral development or a confirmed change in the underlying race.