Michael Katz's endorsement by the Delaware Republican Party has positioned him as the clear frontrunner in the September 15 primary, driving trader consensus toward his 80.5% implied probability. The former state senator's party backing in a two-candidate field with no incumbent provides a structural advantage ahead of the general election contest. John Shulli, an Army War College instructor with a military background, maintains a narrower path at 17% amid stronger early fundraising, yet lacks comparable institutional support. Limited polling and the primary's timing leave room for shifts based on further endorsements or voter outreach in the coming months.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedDelaware Republican Senate Primary Winner
$32,869 Vol.
$32,869 Vol.
Michael Katz
81%
John Shulli
18%
$32,869 Vol.
$32,869 Vol.
Michael Katz
81%
John Shulli
18%
If no 2026 Delaware Republican Senate Primary takes place, this market will resolve to "Other".
The resolution source for this market will be the first announcement of the results from the Delaware Republican party, however an overwhelming consensus of credible reporting may suffice.
Market Opened: Feb 25, 2026, 6:16 PM ET
Resolver
0x69c47De9D...If no 2026 Delaware Republican Senate Primary takes place, this market will resolve to "Other".
The resolution source for this market will be the first announcement of the results from the Delaware Republican party, however an overwhelming consensus of credible reporting may suffice.
Resolver
0x69c47De9D...Michael Katz's endorsement by the Delaware Republican Party has positioned him as the clear frontrunner in the September 15 primary, driving trader consensus toward his 80.5% implied probability. The former state senator's party backing in a two-candidate field with no incumbent provides a structural advantage ahead of the general election contest. John Shulli, an Army War College instructor with a military background, maintains a narrower path at 17% amid stronger early fundraising, yet lacks comparable institutional support. Limited polling and the primary's timing leave room for shifts based on further endorsements or voter outreach in the coming months.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated



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