Michael Katz holds a strong lead in the Delaware Republican Senate primary due to his endorsement from the state Republican Party and prior service as a Democratic state senator from 2009 to 2013, along with his 2024 independent U.S. Senate bid. These factors provide name recognition and institutional support ahead of the September 15 primary, where he faces John Shulli, a U.S. Army colonel and War College instructor with no prior elected office. Shulli has raised more funds and secured some conservative endorsements, yet trader consensus reflected in current pricing shows limited momentum for him. Recent media interviews for both candidates in August have not shifted positioning significantly, with Katz maintaining advantages in party alignment and statewide visibility.
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
89%

John Shulli
11%
$34,497 Vol.
$34,497 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 a strong lead in the Delaware Republican Senate primary due to his endorsement from the state Republican Party and prior service as a Democratic state senator from 2009 to 2013, along with his 2024 independent U.S. Senate bid. These factors provide name recognition and institutional support ahead of the September 15 primary, where he faces John Shulli, a U.S. Army colonel and War College instructor with no prior elected office. Shulli has raised more funds and secured some conservative endorsements, yet trader consensus reflected in current pricing shows limited momentum for him. Recent media interviews for both candidates in August have not shifted positioning significantly, with Katz maintaining advantages in party alignment and statewide visibility.
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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