Michigan Senate is the week's biggest midterm mover: El-Sayed down 7 points

Michigan odds tighten

Democrat Abdul El-Sayed’s probability of winning Michigan’s Senate race on Kalshi fell to 67% from 74% over 7 days. The 7-percentage-point decline makes Michigan the week’s biggest midterm mover in the supplied report, published Oct 12, 2026, at 6:54 AM ET.

Republican Mike Rogers was trading at about 33¢. El-Sayed remains the market favorite, but the latest pricing gives him a smaller advantage than a week earlier.

According to defirate.com, Polymarket displayed a 64¢ price for El-Sayed. The outlet distinguishes between the platforms’ displayed figures: Kalshi reports the last trade, while Polymarket displays the price available to buy.

At the Polymarket ask, a $100 position would pay $156 if correct, before fees, according to defirate.com. The supplied summary also references forecasters’ assessments, but cuts off before identifying their rating.

What it means for prediction markets

• The shift is meaningful, but not a change of favorite: El-Sayed’s Kalshi probability has declined by 7 percentage points while remaining above Rogers’s.
• The platform prices are not directly equivalent: Kalshi’s last-trade figure and Polymarket’s buy price represent different market measures, limiting what readers can infer from the gap.
• External confirmation is incomplete: The supplied material does not establish whether forecasters have changed their assessment alongside the market move.