Will the Republican Party hold exactly 55 Senate seats after the 2026 midterm elections?
Yes at 0% on 28 Oct 2026, down 1 pts over the previous 7 days. No big jumps detected yet.
Data from Polymarket.
Context
This prediction market asks whether the Republican Party will hold exactly 55 seats in the United States Senate following the November 3, 2026 midterm elections. The market resolves based on the official party seat counts established by the regular and special elections scheduled for November 2026.
With less than a week remaining until Election Day, attention is focused on vulnerable senators, key battlegrounds like Arizona and Minnesota, and shifting poll numbers as both parties make their final push. Meanwhile, national figures are actively campaigning across various states to rally support.
Sources: NBC News: Arizona Midterm Elections 2026: Key Races, Candidates and Past Results, The New York Times: Election Dispatches: Trump Rallies in Texas for 3rd Time This Month as G.O.P. Anxieties Mount, NPR: Minnesota becomes battleground as political clashes shape Senate race, NBC News: Midterms 2026: Congress Polls and More, Roll Call: The most vulnerable senators of 2026 less than a week before Election Day, USA Today: One week until the midterms, here are the races to watch, Al Jazeera: US midterms: Six days left – who leads in the polls as Trump, Obama rally
Written by AI from the linked news sources and checked automatically, not by a person.
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Price jumps explained
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Questions about this market
What are the odds for “Will the Republican Party hold exactly 55 Senate seats after the 2026 midterm elections”?
On 28 Oct 2026, Polymarket traders priced Yes at 0%, which means they saw about a 0 in 100 chance. That was down 1 points over the previous 7 days. The live price is shown in the chart at the top of this page.
How does this market resolve?
This market will resolve according to the Republican Party’s seat count in the United States Senate as a result of the 2026 United States midterm election scheduled for November 3, 2026. The full Polymarket rules are at the bottom of this page.
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How this market resolves (Polymarket rules)
This market will resolve according to the Republican Party’s seat count in the United States Senate as a result of the 2026 United States midterm election scheduled for November 3, 2026. The seat count includes 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. 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, the Republican party are included in the 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.