TOTAL VOLUME:
$142.4b
24H VOL:
$104,871,197
24H TRANSACTIONS:
2,643,541,936
OPEN INTEREST:
$1,592,701,755
469,827
Markets across
35,657
events
MATCHED EVENTS:
2,899
PLATFORM COVERAGE:
5
Polymarket:
38%
VS.
Kalshi:
62%
At least 10
- Kalshi
At least 10 - Kalshi
1W
News
Positive
Negative
Neutral
Hover marker for details
Vol.
·
Resolves Feb 1, 2027
$
The outcome depends on the number of U.S. Senate seats won by Democratic Party candidates in the 2026 elections, as determined by major media declarations. The count includes all regularly scheduled and special elections occurring on November 3, 2026, with specific rules for how victories are confirmed and attributed.
The market resolves based on the total number of U.S. Senate seats won by Democratic Party candidates in the November 3, 2026 elections across all 35 contested seats, including special elections in Florida and Ohio. A seat is counted for the Democratic Party only if the winning candidate's candidacy was recorded with a Democratic designation by the relevant election authority—this includes recognized state affiliates like the Minnesota Democratic-Farmer-Labor Party or North Dakota Democratic-Nonpartisan League Party, candidates on specific ballot lines, or declared write-in candidates. Caucus affiliations or later party changes do not affect the count; only the designation at the time of election matters. Media declarations from eight designated sources—the New York Times, The Associated Press, Decision Desk HQ, CNN, Fox News, NBC News, CBS News, and ABC News—determine the official outcome. A seat is officially counted when at least four of these sources have declared a winner without any contradictory declarations. If a seat does not meet this media consensus criterion by the market's expiration time, the state-certified election result determines the winner. Runoff contests are counted once their final results are declared. The market can resolve early if four or more designated sources agree on an outcome with no contradictions, allowing for accelerated closure before the official expiration.
On Kalshi, this market is priced through a continuous double auction, meaning buyers and sellers set the prices for each possible outcome. Traders buy ‘yes’ contracts if they believe an outcome is more likely to occur, and sell ‘no’ contracts if they believe it’s less likely. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of a contract represents the probability of that outcome happening, scaled to a value between 0 and 100. As more traders participate, the prices adjust to reflect the collective wisdom of the crowd, providing a dynamic and real-time forecast for the Senate control market. This creates a constantly evolving assessment of the potential results.
This market resolves around Feb 1, 2027, with the outcome confirmed once the final Senate seat distribution is verifiable from credible public reporting. The resolution will be based on the official results certified by relevant election authorities. This market tracks the total number of Senate seats held by Democrats after the Midterms, and the outcome will reflect that final count. Traders will be able to claim their winnings or fulfill their obligations based on the verified results. The resolution process ensures a transparent and accurate determination of the market’s outcome.
Several signals and events could significantly move this market. Major economic announcements, shifts in key poll numbers, unexpected candidate endorsements, and significant political events could all influence trader sentiment. Any news that alters perceptions of Democratic chances in competitive Senate races will likely impact prices. For example, a strong fundraising report for a Republican challenger could cause prices to shift, while a favorable Supreme Court ruling for Democrats might have the opposite effect. Unexpected events, such as a major scandal involving a candidate, could also cause rapid price movements in this market.