Michael Katz secured the Republican nomination for Delaware’s U.S. Senate seat in the September 15 primary after the Delaware Republican Party endorsed him early and he raised more funds than challenger John Shulli. As a former Democratic state senator, pediatric anesthesiologist, and business owner with prior independent Senate experience, Katz built a broad coalition that translated into roughly 77% of the primary vote once polls closed. Shulli, a military veteran endorsed by figures including Michael Flynn, trailed significantly throughout the short contest. With results certified and the margin exceeding 50 points, trader consensus at 99.6% reflects the completed outcome. Remaining uncertainty is limited to any formal recount petition or administrative challenge before final certification, both of which face high procedural barriers given the vote totals.