Michigan's Senate seat is open because Democrat Gary Peters is retiring. On October 19, 2026 Kalshi had Democrat Abdul El-Sayed at 69% against Republican Mike Rogers, with a separate margin market pricing an El-Sayed win by about 2.4 points. Rogers came within a third of a point of winning a Michigan Senate seat in 2024, which is why the market isn't higher.
Snapshot, October 19, 2026
| Market | Price |
|---|---|
| Kalshi: Abdul El-Sayed (D) wins | 69¢ |
| Kalshi: Mike Rogers (R) wins | ~32¢ |
| Kalshi margin market (Oct 17) | El-Sayed +2.4 |
The candidates
- Abdul El-Sayed (D): won the August 4 primary over Rep. Haley Stevens 48.5% to 47.5%, one of the closest Senate primaries of the cycle.
- Mike Rogers (R): former U.S. representative and the 2024 nominee, when he lost to Elissa Slotkin by about 19,000 votes (0.34 points). Unopposed in this year's primary.
Polls
The Poliwave polling average through October 10 had El-Sayed at 47.5% and Rogers at 44.6%. Individual polls have been mixed: some show El-Sayed several points ahead, others a near-tie or a small Rogers lead. A 3-point average lead in a state Rogers nearly won two years ago is roughly what a 69% price implies.
What moves the price
- New Michigan polls, particularly from nonpartisan pollsters.
- Turnout signals in Detroit and the suburbs, where Democrats need margin.
- The national environment: Democrats' Senate control odds and the generic ballot.
Trading it
Politics contracts carry a 4% taker rate on Polymarket and 7% on Kalshi, applied as rate × P × (1 − P); resting (maker) orders are free on both. Election markets are blocked on Kalshi in Washington and Nevada; see legality by state.
Sources: DefiRate Senate odds tracker (Kalshi, Oct 19, 2026); Kalshi News, Michigan Senate race (Oct 18, 2026); Wikipedia, 2026 United States Senate election in Michigan. Not a recommendation.