Recent polls showing Democratic challengers edging out Republicans in battleground races like Maine (Platner +7 over Collins), North Carolina (Cooper +8 over Whatley), Alaska (Peltola +2 over Sullivan), and Texas (Talarico leading potential GOP nominees Cornyn or Paxton) have traders pricing a tight contest, with implied probabilities clustered around 47-50 Republican seats post-midterms. Republicans defend 22 seats versus Democrats' 13 in the November 3 election, compounded by open seats from retirements including Ernst (IA), Tillis (NC), Daines (MT), McConnell (KY), and Democrats' Durbin (IL), Shaheen (NH), Smith (MN), and Peters (MI). GOP primary runoffs, such as Texas in May, and historical midterm losses for the president's party add uncertainty, while Senate Leader Thune faces internal party criticism over stalled priorities like the Save America Act amid DHS tensions, keeping the path to majority control contested.
Experimental AI-generated summary referencing Polymarket data · Updated51 seats
≤47 26%
49 21%
48 14%
50 13%
$2,044,183 Vol.
$2,044,183 Vol.
≤47
26%
48
14%
49
21%
50
13%
51
10%
52
7%
53
7%
54
3%
55
2%
56
1%
57+
1%
≤47 26%
49 21%
48 14%
50 13%
$2,044,183 Vol.
$2,044,183 Vol.
≤47
$27,243 Vol.
26%
48
$14,717 Vol.
14%
49
$10,628 Vol.
21%
50
$59,581 Vol.
13%
51
$154,216 Vol.
10%
52
$502,407 Vol.
7%
53
$10,259 Vol.
7%
54
$706,168 Vol.
3%
55
$391,042 Vol.
2%
56
$138,698 Vol.
1%
57+
$29,222 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.Recent polls showing Democratic challengers edging out Republicans in battleground races like Maine (Platner +7 over Collins), North Carolina (Cooper +8 over Whatley), Alaska (Peltola +2 over Sullivan), and Texas (Talarico leading potential GOP nominees Cornyn or Paxton) have traders pricing a tight contest, with implied probabilities clustered around 47-50 Republican seats post-midterms. Republicans defend 22 seats versus Democrats' 13 in the November 3 election, compounded by open seats from retirements including Ernst (IA), Tillis (NC), Daines (MT), McConnell (KY), and Democrats' Durbin (IL), Shaheen (NH), Smith (MN), and Peters (MI). GOP primary runoffs, such as Texas in May, and historical midterm losses for the president's party add uncertainty, while Senate Leader Thune faces internal party criticism over stalled priorities like the Save America Act amid DHS tensions, keeping the path to majority control contested.
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
$2,044,183Market 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.Recent polls showing Democratic challengers edging out Republicans in battleground races like Maine (Platner +7 over Collins), North Carolina (Cooper +8 over Whatley), Alaska (Peltola +2 over Sullivan), and Texas (Talarico leading potential GOP nominees Cornyn or Paxton) have traders pricing a tight contest, with implied probabilities clustered around 47-50 Republican seats post-midterms. Republicans defend 22 seats versus Democrats' 13 in the November 3 election, compounded by open seats from retirements including Ernst (IA), Tillis (NC), Daines (MT), McConnell (KY), and Democrats' Durbin (IL), Shaheen (NH), Smith (MN), and Peters (MI). GOP primary runoffs, such as Texas in May, and historical midterm losses for the president's party add uncertainty, while Senate Leader Thune faces internal party criticism over stalled priorities like the Save America Act amid DHS tensions, keeping the path to majority control contested.
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
$2,044,183Market Opened
Dec 18, 2025, 8:55 PM ETResolver
0x2F5e3684c...Recent polls showing Democratic challengers edging out Republicans in battleground races like Maine (Platner +7 over Collins), North Carolina (Cooper +8 over Whatley), Alaska (Peltola +2 over Sullivan), and Texas (Talarico leading potential GOP nominees Cornyn or Paxton) have traders pricing a tight contest, with implied probabilities clustered around 47-50 Republican seats post-midterms. Republicans defend 22 seats versus Democrats' 13 in the November 3 election, compounded by open seats from retirements including Ernst (IA), Tillis (NC), Daines (MT), McConnell (KY), and Democrats' Durbin (IL), Shaheen (NH), Smith (MN), and Peters (MI). GOP primary runoffs, such as Texas in May, and historical midterm losses for the president's party add uncertainty, while Senate Leader Thune faces internal party criticism over stalled priorities like the Save America Act amid DHS tensions, keeping the path to majority control contested.
Experimental AI-generated summary referencing Polymarket data · Updated
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