Michael Katz holds an 88.5% implied probability in the Delaware Republican Senate primary, reflecting trader consensus on his stronger organizational position ahead of the September 15 vote. As the party’s convention nominee, Katz has secured endorsements from the Delaware Republican Party, former U.S. Attorney Julianne Murray, and state legislators, alongside prior legislative experience and a record of building coalitions that include independents. John Shulli, a retired Army colonel and War College instructor, has raised more funds through June but trails in institutional backing within the small Republican primary electorate. The race remains low-profile with limited polling, and no major developments have altered positioning in recent weeks.
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
$34,497 Vol.
$34,497 Vol.

Michael Katz
88%

John Shulli
11%
$34,497 Vol.
$34,497 Vol.

Michael Katz
88%

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, reflecting trader consensus on his stronger organizational position ahead of the September 15 vote. As the party’s convention nominee, Katz has secured endorsements from the Delaware Republican Party, former U.S. Attorney Julianne Murray, and state legislators, alongside prior legislative experience and a record of building coalitions that include independents. John Shulli, a retired Army colonel and War College instructor, has raised more funds through June but trails in institutional backing within the small Republican primary electorate. The race remains low-profile with limited polling, and no major developments have altered positioning in recent weeks.
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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