Delaware Republican primary voters face a choice between Michael Katz and John Shulli ahead of the September 15 contest for the party's U.S. Senate nomination. Katz holds a modest lead in trader consensus due to his recent endorsement by the state Republican Party, which approved him by an 82% margin in a formal vote. His prior service as a Democratic state senator and 2024 independent Senate bid have drawn some intra-party skepticism, yet the official backing provides a clear organizational edge in a low-profile race. Shulli, an instructor at the U.S. Army War College, maintains stronger fundraising totals and cash reserves but lacks comparable institutional support. The endorsement and limited field size remain the primary factors shaping current probabilities in this early-stage primary.
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
$32,261 Vol.
$32,261 Vol.
Michael Katz
55%
John Shulli
36%
$32,261 Vol.
$32,261 Vol.
Michael Katz
55%
John Shulli
36%
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...Delaware Republican primary voters face a choice between Michael Katz and John Shulli ahead of the September 15 contest for the party's U.S. Senate nomination. Katz holds a modest lead in trader consensus due to his recent endorsement by the state Republican Party, which approved him by an 82% margin in a formal vote. His prior service as a Democratic state senator and 2024 independent Senate bid have drawn some intra-party skepticism, yet the official backing provides a clear organizational edge in a low-profile race. Shulli, an instructor at the U.S. Army War College, maintains stronger fundraising totals and cash reserves but lacks comparable institutional support. The endorsement and limited field size remain the primary factors shaping current probabilities in this early-stage primary.
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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