Trump has issued nearly 300 endorsements for 2026 Republican primaries, concentrating on U.S. House and Senate contests where his selections have achieved high primary success rates to date. Recent May primaries tested this influence across multiple states, with backed candidates prevailing in Kentucky and facing runoffs or challenges in Alabama and Georgia amid heavy spending. Ongoing activity includes targeted picks in Senate races such as Texas, where candidates like Ken Paxton and others remain in contention, alongside late endorsements ahead of additional June primaries. These moves reflect Trump's ongoing role in shaping Republican nominee selection ahead of the midterms, with traders monitoring primary results and further announcements through November.