Elections
2026 Midterms: Blue Wave Scenario
The 2026 midterm elections will determine control of the U.S. House and Senate, along with numerous governorships and state legislatures. A “blue wave” refers to a scenario where Democrats make sweeping gains across multiple chambers and races, not just a narrow majority flip. Midterms typically favor the party out of the White House, making the scale of any Democratic gains a central storyline.
Why Markets Are Watching
A sweeping Democratic win would reshape the legislative agenda for the second half of the presidential term, affecting everything from judicial confirmations to budget fights. It would also signal how voters are responding to the administration’s record so far. The magnitude of any shift matters as much as which party wins individual seats.
How Prediction Markets Frame the Outcome
This contract isolates scale rather than simple control, asking whether Democratic gains cross a wave-level threshold rather than just a bare majority. That distinction forces traders to weigh turnout patterns, generic ballot trends, and historical midterm swings together. It turns a broad electoral mood into a single measurable proposition about the size of a political shift.
Related terms
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Democratic Party (United States) -
United States Senate -
United States Congress -
Voter turnout -
National Conference of State Legislatures -
Blue Wave
Total Volume
$3.8m
Kalshi $3.5m · Polymarket $280.8k
Leading Market
Will Democrats hold 218 or more seats in the House AND hold 49 or more seats in the Senate?
Kalshi 85%
Will Democrats hold 218 or more seats in the House AND hold 49 or more seats in the Senate? Volume
$3.5m
Kalshi $3.5m
Will Democrats hold 218 or more seats in the House AND hold 49 or more seats in the Senate? 24h Change
+3.00%
Kalshi +3.00%
Latest Coverage
Insights
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Calculate Your Potential Return
- Kalshi(opens in a new tab) 7.0% fee
- Polymarket(opens in a new tab) 5.0% fee
| Market | Kalshi Yes | Kalshi Fee | Kalshi Payout | Polymarket Yes | Polymarket Fee | Polymarket Payout |
|---|---|---|---|---|---|---|
| Will Democrats hold 218 or more seats in the House AND hold 49 or more seats in the Senate? | 85.0¢ | 7.0% | , trade Will Democrats hold 218 or more seats in the House AND hold 49 or more seats in the Senate? on Kalshi (opens in a new tab) | — | — | — |
| Yes | — | — | — | 86.0¢ | 5% | , trade Yes on Polymarket (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(opens in a new tab) |
|---|---|---|---|
| Will Democrats hold 218 or more seats in the House AND hold 49 or more seats in the Senate? | $3,525,939.60 | No market | |
| Yes | $280,788.87 | No market |