Elections
Will Democrats Sweep the ‘Core Four’ Senate Races in 2026
The 2026 midterms feature a cluster of competitive Senate races that strategists have dubbed the “core four” — contests widely seen as pivotal to control of the chamber. These races are expected to draw heavy spending and national attention as both parties fight for narrow margins. A clean sweep by Democrats in all four would mark a significant shift in the battle for the Senate.
Why Markets Are Watching
Senate control shapes the fate of judicial confirmations, federal legislation, and the balance of power against the sitting administration. A Democratic sweep of these four races would signal broader momentum heading into 2026 and could reshape the map for 2028. Conversely, a split outcome would suggest the map remains competitive and contested state by state.
How Prediction Markets Frame the Outcome
This contract isolates an all-or-nothing outcome rather than tracking each race individually. It asks whether Democratic strength is broad enough to carry every contested seat, not just a majority of them. Traders are effectively weighing correlated risk — whether a shared national environment lifts all four candidates together or whether local dynamics cause at least one race to break differently.
Related terms
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Democratic Party (United States) -
United States Senate -
United States Congress -
Swing state -
2028 United States Senate elections
Total Volume
$538.1k
Kalshi $538.1k
Leading Market
Yes
Kalshi 61%
Yes Volume
$538.1k
Kalshi $538.1k
Yes 24h Change
+9.00%
Kalshi +9.00%
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Calculate Your Potential Return
- Kalshi(opens in a new tab) 7.0% fee
- Polymarket
| Market | Kalshi Yes | Kalshi Fee | Kalshi Payout | Polymarket Yes | Polymarket Fee | Polymarket Payout |
|---|---|---|---|---|---|---|
| Yes | 62.0¢ | 7.0% | , trade Yes on Kalshi (opens in a new tab) | — | — | — |
* Estimates if candidate wins. Actual returns may vary.
All Markets
| Market | Total Volume | Kalshi(opens in a new tab) | Polymarket |
|---|---|---|---|
| Yes | $538,112.89 | No market |