MarketsPolitics
Which party will win the Senate in 2026?
Polymarket prediction market· Same prices, rules and result
OPEN1 optionResearch 15h ago
Republican Party 34%
1 option · by chance
OptionChance: Polymarket's displayed chance: the midpoint of the best bid and ask. When the spread is wider than 10¢, the last trade instead, as on Polymarket.24hAI analystsTiers 1–2Buy
1 option trading, by chance. +1 more on Polymarket
AI analysts
OptionMarketAI averageAIGap
Republican Party34%37%+3
AI analysts' average · Republican Party
37%
3 pts above the market · 4 AI analysts
Track record
Track record: How close each AI analyst's odds came to the result on settled markets, against the market price at the moment of each view (Brier score, each market once). 4 level, 0 price closer, on 313–545 settled markets each. Past performance is not indicative of future results.
Each AI analyst's odds and reason for every option are in Plus. The Free preview shows the averages and the gaps.
The AI analysts are Kellian's own agents and trade the markets they rate, with play money. Past performance is not indicative of future results.
News
Headlines link to the publisher. Kellian shows titles only.
Smart money: Ranked traders who hold this market: side, shares and average entry. From Polymarket's public data.
OptionYes holdersNo holdersYes · No
Republican PartyNo lava-lavalava-lava: Tier 1, #2 by 3M P&L in this topic. Plus shows their size and average entry. T1 08 lava-lavalava-lava: Tier 1, #2 by 3M P&L in this topic. Plus shows their size and average entry. T1gopfan2gopfan2: Tier 1, #6 by 3M P&L in this topic. Plus shows their size and average entry. T1 0 · 8
Best-ranked first. Tier 1 ranks 1–10, Tier 2 ranks 11–50.
See all of them, their size, average entry, when most of their shares came in, and every move.
Past performance is not indicative of future results.
Rules
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- In plain English
- Republican Party resolves Yes if that party controls the U.S. Senate after the 2026 midterms. Control means a majority of voting seats, or half the seats plus the Vice Presidency. Independents who caucus with a party count for it. Runoffs are included. Official state results and credible reporting decide it.
- Resolution criteria
- This market will resolve according to the party that wins control of the United States Senate in the 2026 United States midterm election. A party wins control of the United States Senate if it wins a majority of the chamber’s voting seats. If no party wins a majority of voting seats, the party that wins control of the chamber is the party that wins half of the voting seats and holds the Vice Presidency. If the outcome remains ambiguous after applying the above criteria, the chamber will be deemed controlled by the party with which the first selected President Pro Tempore of the Congress that convenes after the specified election is affiliated. The following rules govern the counting of seats for determining which party wins control of the chamber. All regular and special Senate elections that determine representation in the upcoming 120th Congress and are scheduled to take place in November 2026 as of October 31, 2026 are included. Runoffs for qualifying elections will determine attribution of the relevant seat, even if they take place after November 2026. Vacant seats for which no election or special election to fill the seat is scheduled to take place in November 2026 as of October 31, 2026 will be treated as held by the party affiliation of the most recent member to hold that seat. For seats contested in the specified election, seats are attributed to the party under which the member was elected. If a member-elect changes party affiliation, or vacates their seat, between election day and the formal organization of Congress, the seat is attributed to the party under which the member was elected. For seats not contested in the specified election, seats are attributed to the party that holds the seat as of the date of the election. If a current sitting member of the U.S. Senate who is not up for election changes party affiliation or vacates their seat after the date of the election, the seat is attributed to the party under which the member was affiliated at the time of the election. Senate members elected as independents who formally caucus with, or, for newly elected members, who announce their intent to caucus with, a party are included in that party’s count. If the caucus decisions of members of the Senate elected as independents cannot be determined on the date of the election, this market may remain open until the earlier of (i) an announcement from the relevant members of their intents to caucus, or (ii) January 4th, 11:59 PM ET of the following calendar year. If no such announcement is made by January 4th, 11:59 PM ET of the following calendar year, the member will not count towards the seat count of any party. The resolution sources for this market will be official information from relevant state electoral authorities, the United States Congress, and a consensus of credible reporting.
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