**Democratic Senate incumbents seeking renomination in 2026 have faced limited organized opposition, keeping the probability of zero losses at 78.5%.** Most Democratic-held seats feature either retiring senators creating open primaries or incumbents such as Jon Ossoff, Cory Booker, and Ben Ray Luján who cleared their primaries with minimal resistance. Progressive challenges and outsider candidacies have produced notable upsets in House races and some open Senate contests, including Abdul El-Sayed’s victory in Michigan, yet these dynamics have not translated into defeats for sitting Democratic senators. With primaries largely concluded or non-competitive for incumbents by mid-August, traders assign only modest odds to one or more losses.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHow many Democratic Senate Incumbents will not win their Primary?
How many Democratic Senate Incumbents will not win their Primary?
0 79%
1 12.3%
2 3.4%
4 <1%
$14,008 Vol.
$14,008 Vol.
0
79%
1
12%
2
3%
3
<1%
4
1%
>4
6%
0 79%
1 12.3%
2 3.4%
4 <1%
$14,008 Vol.
$14,008 Vol.
0
$8,581 Vol.
79%
1
$1,887 Vol.
12%
2
$1,518 Vol.
3%
3
$697 Vol.
<1%
4
$724 Vol.
1%
>4
$602 Vol.
6%
The 2026 midterm elections are scheduled to be held on November 3, 2026, with congressional primaries running from March through September.
This market will resolve according to the number of Democratic Senate incumbents who do not win their nominating election to move on to the general election as a result of the 2026 midterm primary elections.
An incumbent will be considered not to have won their election if they are not declared the winner of the election they sought, including if they withdraw, suspend, or otherwise leave the race at any point after officially registering as a candidate, regardless of the reason. Incumbents who do not officially register as candidates for reelection will not be considered.
This market will resolve based on the results of all Senate nominating elections, including party primaries, top-two or jungle primaries, and primaries for special elections, that are scheduled to occur between March 1 and September 30, 2026. If a required runoff for any such election or a subsequent qualifying round in a non-partisan primary system could change the market’s outcome, the market will remain open until that contest is conclusively called by this market’s resolution sources.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time of their nominating election. 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 prior to the conclusion of the relevant nominating election.
The resolution source for this market will be the Associated Press, Fox News, and NBC. This market will resolve once all three sources have conclusively called all relevant nominating elections. If all three sources do not achieve consensus in calling the relevant races for this market, it will resolve based on official state certification of the nominating election results.**Democratic Senate incumbents seeking renomination in 2026 have faced limited organized opposition, keeping the probability of zero losses at 78.5%.** Most Democratic-held seats feature either retiring senators creating open primaries or incumbents such as Jon Ossoff, Cory Booker, and Ben Ray Luján who cleared their primaries with minimal resistance. Progressive challenges and outsider candidacies have produced notable upsets in House races and some open Senate contests, including Abdul El-Sayed’s victory in Michigan, yet these dynamics have not translated into defeats for sitting Democratic senators. With primaries largely concluded or non-competitive for incumbents by mid-August, traders assign only modest odds to one or more losses.
The 2026 midterm elections are scheduled to be held on November 3, 2026, with congressional primaries running from March through September.
This market will resolve according to the number of Democratic Senate incumbents who do not win their nominating election to move on to the general election as a result of the 2026 midterm primary elections.
An incumbent will be considered not to have won their election if they are not declared the winner of the election they sought, including if they withdraw, suspend, or otherwise leave the race at any point after officially registering as a candidate, regardless of the reason. Incumbents who do not officially register as candidates for reelection will not be considered.
This market will resolve based on the results of all Senate nominating elections, including party primaries, top-two or jungle primaries, and primaries for special elections, that are scheduled to occur between March 1 and September 30, 2026. If a required runoff for any such election or a subsequent qualifying round in a non-partisan primary system could change the market’s outcome, the market will remain open until that contest is conclusively called by this market’s resolution sources.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time of their nominating election. 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 prior to the conclusion of the relevant nominating election.
The resolution source for this market will be the Associated Press, Fox News, and NBC. This market will resolve once all three sources have conclusively called all relevant nominating elections. If all three sources do not achieve consensus in calling the relevant races for this market, it will resolve based on official state certification of the nominating election results.
This market will resolve according to the number of Democratic Senate incumbents who do not win their nominating election to move on to the general election as a result of the 2026 midterm primary elections.
An incumbent will be considered not to have won their election if they are not declared the winner of the election they sought, including if they withdraw, suspend, or otherwise leave the race at any point after officially registering as a candidate, regardless of the reason. Incumbents who do not officially register as candidates for reelection will not be considered.
This market will resolve based on the results of all Senate nominating elections, including party primaries, top-two or jungle primaries, and primaries for special elections, that are scheduled to occur between March 1 and September 30, 2026. If a required runoff for any such election or a subsequent qualifying round in a non-partisan primary system could change the market’s outcome, the market will remain open until that contest is conclusively called by this market’s resolution sources.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time of their nominating election. 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 prior to the conclusion of the relevant nominating election.
The resolution source for this market will be the Associated Press, Fox News, and NBC. This market will resolve once all three sources have conclusively called all relevant nominating elections. If all three sources do not achieve consensus in calling the relevant races for this market, it will resolve based on official state certification of the nominating election results.
Market Opened: Jan 14, 2026, 2:52 PM ET
Volume
$14,008Market Opened
Jan 14, 2026, 2:52 PM ETResolver
0x2F5e3684c...The 2026 midterm elections are scheduled to be held on November 3, 2026, with congressional primaries running from March through September.
This market will resolve according to the number of Democratic Senate incumbents who do not win their nominating election to move on to the general election as a result of the 2026 midterm primary elections.
An incumbent will be considered not to have won their election if they are not declared the winner of the election they sought, including if they withdraw, suspend, or otherwise leave the race at any point after officially registering as a candidate, regardless of the reason. Incumbents who do not officially register as candidates for reelection will not be considered.
This market will resolve based on the results of all Senate nominating elections, including party primaries, top-two or jungle primaries, and primaries for special elections, that are scheduled to occur between March 1 and September 30, 2026. If a required runoff for any such election or a subsequent qualifying round in a non-partisan primary system could change the market’s outcome, the market will remain open until that contest is conclusively called by this market’s resolution sources.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time of their nominating election. 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 prior to the conclusion of the relevant nominating election.
The resolution source for this market will be the Associated Press, Fox News, and NBC. This market will resolve once all three sources have conclusively called all relevant nominating elections. If all three sources do not achieve consensus in calling the relevant races for this market, it will resolve based on official state certification of the nominating election results.**Democratic Senate incumbents seeking renomination in 2026 have faced limited organized opposition, keeping the probability of zero losses at 78.5%.** Most Democratic-held seats feature either retiring senators creating open primaries or incumbents such as Jon Ossoff, Cory Booker, and Ben Ray Luján who cleared their primaries with minimal resistance. Progressive challenges and outsider candidacies have produced notable upsets in House races and some open Senate contests, including Abdul El-Sayed’s victory in Michigan, yet these dynamics have not translated into defeats for sitting Democratic senators. With primaries largely concluded or non-competitive for incumbents by mid-August, traders assign only modest odds to one or more losses.
The 2026 midterm elections are scheduled to be held on November 3, 2026, with congressional primaries running from March through September.
This market will resolve according to the number of Democratic Senate incumbents who do not win their nominating election to move on to the general election as a result of the 2026 midterm primary elections.
An incumbent will be considered not to have won their election if they are not declared the winner of the election they sought, including if they withdraw, suspend, or otherwise leave the race at any point after officially registering as a candidate, regardless of the reason. Incumbents who do not officially register as candidates for reelection will not be considered.
This market will resolve based on the results of all Senate nominating elections, including party primaries, top-two or jungle primaries, and primaries for special elections, that are scheduled to occur between March 1 and September 30, 2026. If a required runoff for any such election or a subsequent qualifying round in a non-partisan primary system could change the market’s outcome, the market will remain open until that contest is conclusively called by this market’s resolution sources.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time of their nominating election. 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 prior to the conclusion of the relevant nominating election.
The resolution source for this market will be the Associated Press, Fox News, and NBC. This market will resolve once all three sources have conclusively called all relevant nominating elections. If all three sources do not achieve consensus in calling the relevant races for this market, it will resolve based on official state certification of the nominating election results.
This market will resolve according to the number of Democratic Senate incumbents who do not win their nominating election to move on to the general election as a result of the 2026 midterm primary elections.
An incumbent will be considered not to have won their election if they are not declared the winner of the election they sought, including if they withdraw, suspend, or otherwise leave the race at any point after officially registering as a candidate, regardless of the reason. Incumbents who do not officially register as candidates for reelection will not be considered.
This market will resolve based on the results of all Senate nominating elections, including party primaries, top-two or jungle primaries, and primaries for special elections, that are scheduled to occur between March 1 and September 30, 2026. If a required runoff for any such election or a subsequent qualifying round in a non-partisan primary system could change the market’s outcome, the market will remain open until that contest is conclusively called by this market’s resolution sources.
A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time of their nominating election. 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 prior to the conclusion of the relevant nominating election.
The resolution source for this market will be the Associated Press, Fox News, and NBC. This market will resolve once all three sources have conclusively called all relevant nominating elections. If all three sources do not achieve consensus in calling the relevant races for this market, it will resolve based on official state certification of the nominating election results.
Volume
$14,008Market Opened
Jan 14, 2026, 2:52 PM ETResolver
0x2F5e3684c...**Democratic Senate incumbents seeking renomination in 2026 have faced limited organized opposition, keeping the probability of zero losses at 78.5%.** Most Democratic-held seats feature either retiring senators creating open primaries or incumbents such as Jon Ossoff, Cory Booker, and Ben Ray Luján who cleared their primaries with minimal resistance. Progressive challenges and outsider candidacies have produced notable upsets in House races and some open Senate contests, including Abdul El-Sayed’s victory in Michigan, yet these dynamics have not translated into defeats for sitting Democratic senators. With primaries largely concluded or non-competitive for incumbents by mid-August, traders assign only modest odds to one or more losses.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedRelated
Will Republican Senate incumbents not win in exactly three nominating elections in the 2026 cycle?
82%
Will Republican House incumbents not win in between four and six nominating elections in the 2026 cycle?
93%
Will the Republican Party hold fewer than 22 governorships after the 2026 midterm elections?
32%
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Frequently Asked Questions