**Two Republican Senate incumbents—Bill Cassidy of Louisiana and John Cornyn of Texas—have already lost renomination in 2026 primaries to challengers backed by President Trump, establishing a baseline of two defeats and elevating expectations for one additional upset.** These losses, the first multiple-incumbent Senate primary defeats since 2010, reflect voter shifts toward Trump-aligned candidates in states with competitive GOP fields. Remaining primaries, including potential contests involving other Class II senators, show limited signs of further disruption based on current filing and polling patterns. Trader consensus at 81.8% for exactly three total losses incorporates these confirmed results while assigning low probability to zero or one additional defeat, consistent with historical low rates of Senate incumbent primary losses outside wave cycles.
Riepilogo sperimentale generato dall'AI con riferimento ai dati di Polymarket. Questo non è un consiglio di trading e non ha alcun ruolo nella risoluzione di questo mercato. · Aggiornato3 81.8%
4 8.8%
2 8.2%
>4 5.2%
$54,320 Vol.
$54,320 Vol.
0
<1%
1
<1%
2
8%
3
82%
4
9%
>4
5%
3 81.8%
4 8.8%
2 8.2%
>4 5.2%
$54,320 Vol.
$54,320 Vol.
0
<1%
1
<1%
2
8%
3
82%
4
9%
>4
5%
This market will resolve according to the number of Republican 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.
Mercato aperto: Jan 14, 2026, 2:51 PM ET
Resolver
0x2F5e3684c...This market will resolve according to the number of Republican 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.
Resolver
0x2F5e3684c...**Two Republican Senate incumbents—Bill Cassidy of Louisiana and John Cornyn of Texas—have already lost renomination in 2026 primaries to challengers backed by President Trump, establishing a baseline of two defeats and elevating expectations for one additional upset.** These losses, the first multiple-incumbent Senate primary defeats since 2010, reflect voter shifts toward Trump-aligned candidates in states with competitive GOP fields. Remaining primaries, including potential contests involving other Class II senators, show limited signs of further disruption based on current filing and polling patterns. Trader consensus at 81.8% for exactly three total losses incorporates these confirmed results while assigning low probability to zero or one additional defeat, consistent with historical low rates of Senate incumbent primary losses outside wave cycles.
Riepilogo sperimentale generato dall'AI con riferimento ai dati di Polymarket. Questo non è un consiglio di trading e non ha alcun ruolo nella risoluzione di questo mercato. · Aggiornato


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