Michael Katz leads the Delaware Republican Senate primary market at 72% because traders weigh his prior elected experience as a state senator and 2024 statewide independent candidacy as stronger assets for name recognition and organizational support ahead of the September 15 primary. John Shulli trails at 19% despite higher fundraising totals, reflecting his more recent entry and lack of prior elected office. No major new endorsements, polls, or campaign events have shifted positioning in recent weeks, leaving the gap driven by Katz’s established Delaware profile versus Shulli’s military and academic background.