Will the Republican Party hold exactly 46 Senate seats after the 2026 midterm elections?
Odds, price jumps explained, and what could move it next
Yes at 2% on 4 Nov 2026, down 12 pts over the previous 7 days. 3 big jumps since 24 Oct 2026, listed below.
Data from Polymarket. Numbered dots are the jumps explained below.
Context
This prediction market asks whether the Republican Party will hold exactly 46 Senate seats following the November 3, 2026 midterm elections. The market resolves based on the final official seat count for the upcoming 120th Congress, incorporating regular and special elections as well as applicable runoff results and vacancy rules.
Early results and projections from election night indicate significant Democratic gains in the Senate and House. Notably, Democrat Troy Jackson defeated incumbent Republican Susan Collins in Maine, while competitive races in states like Mississippi and Alaska remain closely watched.
The elections took place on November 3, 2026, shaping the balance of power in Congress as vote counting continues across the country.
Sources: Alaska Public Media: Peltola takes early lead in Alaska’s U.S. Senate race, CBS News: Troy Jackson wins Maine 2026 Senate election, flipping seat for Democrats, ABC News - Breaking News, Latest News and Videos: 2026 midterm elections: Democrats projected to gain control of House and Senate, Mississippi Today: Mississippi Senate election is too close to call Tuesday night, Alaska Beacon: Democratic candidate Mary Peltola leads in early vote counts for Alaska’s US Senate election, BBC: Anthony Zurcher: Democrats tear up Trump's political map on historic night, NPR: Troy Jackson wins Maine Senate race over Susan Collins, in major coup for Democrats, PBS: Democrat Troy Jackson wins election to U.S. Senate from Maine, BBC: Republican Susan Collins loses seat, ending almost 30 years in the Senate, AP News: Democrats win the US House, taking full control of Congress as voters express frustration with Trump, Forbes: Midterm Election Results (Live Updates): Democrats Sweep House And Senate In Stunning Rout
Written by AI from the linked news sources and checked automatically, not by a person.
What could move it next
No upcoming events listed for this market yet.
Price jumps explained
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4 Nov 2026
Jump detected
Not explained yet. The write-up is added automatically, usually within a few hours.
After 24 h: too early. After 7 days: too early.
-
25 Oct 2026
Jump detected
Not explained yet. The write-up is added automatically, usually within a few hours.
After 24 h: partly reverted. After 7 days: partly reverted.
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24 Oct 2026
Jump detected
Not explained yet. The write-up is added automatically, usually within a few hours.
After 24 h: partly reverted. After 7 days: partly reverted.
Other markets in “Republican Senate seats after the midterms (Lower Brackets)”
Questions about this market
What are the odds for “Will the Republican Party hold exactly 46 Senate seats after the 2026 midterm elections”?
On 4 Nov 2026, Polymarket traders priced Yes at 2%, which means they saw about a 2 in 100 chance. That was down 12 points over the previous 7 days. The live price is shown in the chart at the top of this page.
Do big jumps in this market usually hold?
Of the 2 big jumps old enough to check, 0 held after 24 hours (kept at least 70% of the move). The rest partly or fully reverted.
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.
Can I bet on this market on predictionwave?
No. predictionwave only explains the odds. The market itself runs on Polymarket, and trading there is not allowed in every country.
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.