Republicans currently hold a 53-47 Senate majority but defend 22 seats in the 2026 midterms, including vulnerabilities in battleground states like Maine, where incumbent Susan Collins faces a toss-up rating, and open North Carolina after Thom Tillis's retirement. Trader consensus reflects a tight race clustered around 47-51 Republican seats, driven by historical midterm penalties for the president's party—averaging three Senate losses—and recent polls showing Democrats competitive in Georgia and Michigan. Inflation concerns and a Democratic generic ballot edge have fueled bullishness, per April reports from CNN and the New York Times identifying nine key races. Shifts could emerge from economic improvements, strong GOP recruitment in swing states, or late primaries resolving in toss-ups like Texas.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$2,069,690 Vol.
$2,069,690 Vol.
≤47
27%
48
13%
49
17%
50
15%
51
14%
52
7%
53
5%
54
1%
55
2%
56
1%
57+
1%
$2,069,690 Vol.
$2,069,690 Vol.
≤47
$34,228 Vol.
27%
48
$16,491 Vol.
13%
49
$12,332 Vol.
17%
50
$61,461 Vol.
15%
51
$157,843 Vol.
14%
52
$505,003 Vol.
7%
53
$13,095 Vol.
5%
54
$707,106 Vol.
1%
55
$391,942 Vol.
2%
56
$140,274 Vol.
1%
57+
$29,915 Vol.
1%
The 2026 midterm elections are scheduled to be held on November 3, 2026.
This market will resolve according to the number of seats held by the Republican Party in the US Senate as a result of the 2026 midterm elections.
This market will resolve based on the results of all Senate elections, including special elections, that are scheduled to occur in November 2026 as of October 31, 2026. If a required runoff for any such election could change the market’s outcome, the market will remain open until that runoff is conclusively called by this market’s resolution sources.
If a Senate seat is vacant but a corresponding election is not held in November 2026, the seat will be considered held by the party of the seat's most recent incumbent.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 Senate elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democratic or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the Senate elections are conclusively called by this market's resolution sources.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources have conclusively called all Senate elections. If all three sources do not achieve consensus in calling the relevant races for this market, it will resolve based on the official certification.Republicans currently hold a 53-47 Senate majority but defend 22 seats in the 2026 midterms, including vulnerabilities in battleground states like Maine, where incumbent Susan Collins faces a toss-up rating, and open North Carolina after Thom Tillis's retirement. Trader consensus reflects a tight race clustered around 47-51 Republican seats, driven by historical midterm penalties for the president's party—averaging three Senate losses—and recent polls showing Democrats competitive in Georgia and Michigan. Inflation concerns and a Democratic generic ballot edge have fueled bullishness, per April reports from CNN and the New York Times identifying nine key races. Shifts could emerge from economic improvements, strong GOP recruitment in swing states, or late primaries resolving in toss-ups like Texas.
The 2026 midterm elections are scheduled to be held on November 3, 2026.
This market will resolve according to the number of seats held by the Republican Party in the US Senate as a result of the 2026 midterm elections.
This market will resolve based on the results of all Senate elections, including special elections, that are scheduled to occur in November 2026 as of October 31, 2026. If a required runoff for any such election could change the market’s outcome, the market will remain open until that runoff is conclusively called by this market’s resolution sources.
If a Senate seat is vacant but a corresponding election is not held in November 2026, the seat will be considered held by the party of the seat's most recent incumbent.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 Senate elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democratic or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the Senate elections are conclusively called by this market's resolution sources.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources have conclusively called all Senate elections. If all three sources do not achieve consensus in calling the relevant races for this market, it will resolve based on the official certification.
This market will resolve according to the number of seats held by the Republican Party in the US Senate as a result of the 2026 midterm elections.
This market will resolve based on the results of all Senate elections, including special elections, that are scheduled to occur in November 2026 as of October 31, 2026. If a required runoff for any such election could change the market’s outcome, the market will remain open until that runoff is conclusively called by this market’s resolution sources.
If a Senate seat is vacant but a corresponding election is not held in November 2026, the seat will be considered held by the party of the seat's most recent incumbent.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 Senate elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democratic or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the Senate elections are conclusively called by this market's resolution sources.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources have conclusively called all Senate elections. If all three sources do not achieve consensus in calling the relevant races for this market, it will resolve based on the official certification.
Market Opened: Dec 18, 2025, 8:55 PM ET
Volume
$2,069,690Market Opened
Dec 18, 2025, 8:55 PM ETResolver
0x2F5e3684c...The 2026 midterm elections are scheduled to be held on November 3, 2026.
This market will resolve according to the number of seats held by the Republican Party in the US Senate as a result of the 2026 midterm elections.
This market will resolve based on the results of all Senate elections, including special elections, that are scheduled to occur in November 2026 as of October 31, 2026. If a required runoff for any such election could change the market’s outcome, the market will remain open until that runoff is conclusively called by this market’s resolution sources.
If a Senate seat is vacant but a corresponding election is not held in November 2026, the seat will be considered held by the party of the seat's most recent incumbent.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 Senate elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democratic or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the Senate elections are conclusively called by this market's resolution sources.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources have conclusively called all Senate elections. If all three sources do not achieve consensus in calling the relevant races for this market, it will resolve based on the official certification.Republicans currently hold a 53-47 Senate majority but defend 22 seats in the 2026 midterms, including vulnerabilities in battleground states like Maine, where incumbent Susan Collins faces a toss-up rating, and open North Carolina after Thom Tillis's retirement. Trader consensus reflects a tight race clustered around 47-51 Republican seats, driven by historical midterm penalties for the president's party—averaging three Senate losses—and recent polls showing Democrats competitive in Georgia and Michigan. Inflation concerns and a Democratic generic ballot edge have fueled bullishness, per April reports from CNN and the New York Times identifying nine key races. Shifts could emerge from economic improvements, strong GOP recruitment in swing states, or late primaries resolving in toss-ups like Texas.
The 2026 midterm elections are scheduled to be held on November 3, 2026.
This market will resolve according to the number of seats held by the Republican Party in the US Senate as a result of the 2026 midterm elections.
This market will resolve based on the results of all Senate elections, including special elections, that are scheduled to occur in November 2026 as of October 31, 2026. If a required runoff for any such election could change the market’s outcome, the market will remain open until that runoff is conclusively called by this market’s resolution sources.
If a Senate seat is vacant but a corresponding election is not held in November 2026, the seat will be considered held by the party of the seat's most recent incumbent.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 Senate elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democratic or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the Senate elections are conclusively called by this market's resolution sources.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources have conclusively called all Senate elections. If all three sources do not achieve consensus in calling the relevant races for this market, it will resolve based on the official certification.
This market will resolve according to the number of seats held by the Republican Party in the US Senate as a result of the 2026 midterm elections.
This market will resolve based on the results of all Senate elections, including special elections, that are scheduled to occur in November 2026 as of October 31, 2026. If a required runoff for any such election could change the market’s outcome, the market will remain open until that runoff is conclusively called by this market’s resolution sources.
If a Senate seat is vacant but a corresponding election is not held in November 2026, the seat will be considered held by the party of the seat's most recent incumbent.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 Senate elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democratic or Republican parties will be considered a member of one of these parties based on the party with which they most recently expressed their intent to caucus at the time all of the Senate elections are conclusively called by this market's resolution sources.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources have conclusively called all Senate elections. If all three sources do not achieve consensus in calling the relevant races for this market, it will resolve based on the official certification.
Volume
$2,069,690Market Opened
Dec 18, 2025, 8:55 PM ETResolver
0x2F5e3684c...Republicans currently hold a 53-47 Senate majority but defend 22 seats in the 2026 midterms, including vulnerabilities in battleground states like Maine, where incumbent Susan Collins faces a toss-up rating, and open North Carolina after Thom Tillis's retirement. Trader consensus reflects a tight race clustered around 47-51 Republican seats, driven by historical midterm penalties for the president's party—averaging three Senate losses—and recent polls showing Democrats competitive in Georgia and Michigan. Inflation concerns and a Democratic generic ballot edge have fueled bullishness, per April reports from CNN and the New York Times identifying nine key races. Shifts could emerge from economic improvements, strong GOP recruitment in swing states, or late primaries resolving in toss-ups like Texas.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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