Incumbent Democrat Chris Coons seeks a fourth term in Delaware's U.S. Senate race, where all major forecasters rate the contest Solid or Safe Democratic ahead of the September 15 primaries and November 3 general election. Traders assign Democrats a 96% implied probability due to the state's consistent Democratic voting patterns, including double-digit margins in recent presidential contests, and the absence of a viable Republican challenger since the mid-1990s. Republican primary candidates such as Michael Katz face structural headwinds with limited fundraising and name recognition. Potential shifts remain possible through a major scandal, health event affecting the incumbent, or an unforeseen national political realignment before Election Day.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated$16,526 Vol.
$16,526 Vol.

Democrat
96%

Republican
5%
$16,526 Vol.
$16,526 Vol.

Democrat
96%

Republican
5%
A candidate shall 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 or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options 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 the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Market Opened: Oct 13, 2025, 5:35 PM ET
Resolver
0x2F5e3684c...A candidate shall 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 or Republican nominee (e.g., Greens, Libertarian, independent) may be added at a later date.
Candidates who run as independents will not be encompassed by the “Democrat” or “Republican” options 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 the race for the same candidate. If all three sources haven’t called the race in this state for the same candidate, this market will resolve based on the official certification.
Resolver
0x2F5e3684c...Incumbent Democrat Chris Coons seeks a fourth term in Delaware's U.S. Senate race, where all major forecasters rate the contest Solid or Safe Democratic ahead of the September 15 primaries and November 3 general election. Traders assign Democrats a 96% implied probability due to the state's consistent Democratic voting patterns, including double-digit margins in recent presidential contests, and the absence of a viable Republican challenger since the mid-1990s. Republican primary candidates such as Michael Katz face structural headwinds with limited fundraising and name recognition. Potential shifts remain possible through a major scandal, health event affecting the incumbent, or an unforeseen national political realignment before Election Day.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

Beware of external links.
Beware of external links.
Frequently Asked Questions