Michael Katz holds an 88.5% implied probability in the Delaware Republican Senate primary, driven primarily by his endorsement from the state Republican Party. A former Democratic state senator who switched affiliation and ran as an independent in 2024, Katz benefits from established party infrastructure and name recognition among Republican voters ahead of the September 15 primary. John Shulli, an Army colonel and veteran with Pentagon experience, trails at 11.7% while emphasizing border security and trade issues, though he trails in party backing despite competitive fundraising. Trader consensus reflects the structural edge party support typically provides in low-turnout Delaware Republican primaries.
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
$34,484 Vol.
$34,484 Vol.

Michael Katz
89%

John Shulli
11%
$34,484 Vol.
$34,484 Vol.

Michael Katz
89%

John Shulli
11%
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 holds an 88.5% implied probability in the Delaware Republican Senate primary, driven primarily by his endorsement from the state Republican Party. A former Democratic state senator who switched affiliation and ran as an independent in 2024, Katz benefits from established party infrastructure and name recognition among Republican voters ahead of the September 15 primary. John Shulli, an Army colonel and veteran with Pentagon experience, trails at 11.7% while emphasizing border security and trade issues, though he trails in party backing despite competitive fundraising. Trader consensus reflects the structural edge party support typically provides in low-turnout Delaware Republican primaries.
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