Michael Katz leads the Delaware Republican Senate primary with strong party backing and endorsements that have consolidated support among primary voters. The Delaware Republican Party nominated him at its April 2026 convention by an 81.7% delegate margin, and he has secured support from former state party chair and U.S. Attorney Julianne Murray along with state Senator David Lawson. Katz’s background as a former state senator and physician has aided efforts to build a coalition reaching beyond core Republican voters in the closed primary ahead of the September 15 vote. John Shulli, a retired Army colonel emphasizing military and energy policy, maintains a smaller share of support despite higher reported fundraising through June. Trader consensus reflected in current pricing aligns with these organizational and endorsement advantages in the low-profile contest.
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
12%
$34,497 Vol.
$34,497 Vol.

Michael Katz
89%

John Shulli
12%
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 leads the Delaware Republican Senate primary with strong party backing and endorsements that have consolidated support among primary voters. The Delaware Republican Party nominated him at its April 2026 convention by an 81.7% delegate margin, and he has secured support from former state party chair and U.S. Attorney Julianne Murray along with state Senator David Lawson. Katz’s background as a former state senator and physician has aided efforts to build a coalition reaching beyond core Republican voters in the closed primary ahead of the September 15 vote. John Shulli, a retired Army colonel emphasizing military and energy policy, maintains a smaller share of support despite higher reported fundraising through June. Trader consensus reflected in current pricing aligns with these organizational and endorsement advantages in the low-profile contest.
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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