Michael Katz holds a commanding lead in the Delaware Republican Senate primary, scheduled for September 15, 2026, driven by party endorsement, prior legislative experience as a state senator, and support from Republican leaders including former U.S. Attorney Julianne Murray. His background as a physician and business owner, combined with a coalition-building approach from his 2024 independent Senate bid, positions him as the preferred choice among primary voters seeking broader appeal in a Democratic-leaning state. John Shulli, an Army colonel and instructor at the U.S. Army War College, brings military and national security credentials but trails significantly in endorsements and visibility. Trader consensus at these levels reflects Katz’s structural advantages ahead of the vote, though a surprise shift could occur from unusually low turnout or unforeseen late developments in the final days.