Trader consensus on Polymarket reflects a 76% implied probability for Democrats to win all core four Senate races—Montana (Tester), Ohio (Brown), Pennsylvania (Casey), and Michigan (Slotkin)—driven by consistent polling leads in the latest surveys from early October. Tester holds a 4-6 point edge over Sheehy per Fox News and RMG Research; Brown leads Moreno by 3 points in Trafalgar; Casey edges McCormick amid tight battleground dynamics; and Slotkin advances against Rogers per Glengariff. No major GOP surges emerged from the VP debate or final campaign pushes, with Democratic incumbency advantages and strong early voting turnout in swing states bolstering odds. Election Day on November 5 remains the key catalyst, though any late October surprises could shift the closely tracked map.
Experimental AI-generated summary referencing Polymarket data · UpdatedWill Democrats win all "core four" senate races?
Will Democrats win all "core four" senate races?
A candidate will be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic nominee (e.g., Greens, Libertarian, independent) will not count. Candidates who run as independents will not be considered a Democrat, regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call all relevant races for the same candidate. If all three sources don’t call a relevant race for the same candidate, this market will use the official certification of the election results for resolution.
Market Opened: Jan 13, 2026, 6:08 PM ET
Resolver
0x65070BE91...A candidate will be considered to represent a party in the event that he or she is the nominee of the party in question. Candidates other than the Democratic nominee (e.g., Greens, Libertarian, independent) will not count. Candidates who run as independents will not be considered a Democrat, regardless of any affiliation they may have with the party.
The resolution source for this market is the Associated Press, Fox News, and NBC. This market will resolve once all three sources call all relevant races for the same candidate. If all three sources don’t call a relevant race for the same candidate, this market will use the official certification of the election results for resolution.
Resolver
0x65070BE91...Trader consensus on Polymarket reflects a 76% implied probability for Democrats to win all core four Senate races—Montana (Tester), Ohio (Brown), Pennsylvania (Casey), and Michigan (Slotkin)—driven by consistent polling leads in the latest surveys from early October. Tester holds a 4-6 point edge over Sheehy per Fox News and RMG Research; Brown leads Moreno by 3 points in Trafalgar; Casey edges McCormick amid tight battleground dynamics; and Slotkin advances against Rogers per Glengariff. No major GOP surges emerged from the VP debate or final campaign pushes, with Democratic incumbency advantages and strong early voting turnout in swing states bolstering odds. Election Day on November 5 remains the key catalyst, though any late October surprises could shift the closely tracked map.
Experimental AI-generated summary referencing Polymarket data · Updated
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