South Carolina Senate race odds
Kalshi vs Polymarket · updated Oct 20, 1:07 AM ET
Republicans (Darline Graham) to win the South Carolina Senate race: Kalshi 82.5¢, Polymarket US 83.5¢, Polymarket 82.5¢. The exchanges are 1¢ apart. A price of 67¢ means the market implies roughly a 67% chance; it is a price, not a forecast.
South Carolina Senate betting odds by venue
| Venue | Republicans win | Odds | Bid | Ask | Volume |
|---|---|---|---|---|---|
| Kalshi | 82.5¢ | -471 | 82¢ | 83¢ | $1.2M |
| Polymarket US | 83.5¢ | -506 | 83¢ | 84¢ | $254k |
| Polymarket | 82.5¢ | -471 | 82¢ | 83¢ | $370k |
Each row prices the outcome it names, in cents; 50¢ is a coin flip. Volume is in each venue’s own units. Full venue comparison
Price history
Last 90 days, Republicans win. Kalshi solid, Polymarket dashed. A break in a line is a gap in the record, not a move.
Polls beside the prices
| Pollster | Fieldwork ends | Sample | Result | Lead |
|---|---|---|---|---|
| InsiderAdvantage | 2026-09-29 | 1,200 LV | Darline Graham 46 · Annie Andrews 45 · Mark Hackett 3 | +1 |
| InsiderAdvantage | 2026-09-09 | 1,200 LV | Darline Graham 45.1 · Annie Andrews 43.2 | +1.9 |
Polls: VoteHub (CC BY 4.0). A poll is a separate reading of the same race; the two can differ with neither being wrong.
Common questions
What are the odds in the South Carolina Senate race?
Republicans (Darline Graham) to win the South Carolina Senate race: Kalshi 82.5¢, Polymarket US 83.5¢, Polymarket 82.5¢. The exchanges are 1¢ apart. A price of 67¢ means the market implies roughly a 67% chance; it is a price, not a forecast.
Why do Kalshi and Polymarket show different prices for the same race?
Each exchange is its own order book with its own traders, fees and rules. A gap of a cent or two is ordinary; a larger gap can come from a thin book or from a settlement-rule difference, which is why each venue links to its own contract.
Is the price a forecast?
No. It is what the best order or last trade implies at that venue. ThinBlimp shows both venues side by side and does not take wagers or give advice.
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