Michael Katz leads the Delaware Republican Senate primary with trader consensus at 79.5 percent, driven primarily by his recent endorsement from the state Republican Party and prior nomination at the party convention. As a former Democratic state senator who switched parties, Katz benefits from institutional support in a low-profile contest against John Shulli, a U.S. Army War College instructor and Delaware native. Shulli trails at 24.5 percent despite stronger early fundraising. The September 15 primary remains months away, leaving room for shifts from additional endorsements, campaign events, or turnout dynamics in the closed Republican primary process.