Trump's endorsements in the 2026 Republican primaries have centered on congressional, Senate, and gubernatorial races, with over 300 candidates backed so far and a 97% primary success rate across tracked contests. Recent developments include a series of losses in open gubernatorial primaries this summer, including in Minnesota, Michigan, and Tennessee, alongside continued strong performance in most House races. Florida's August 18 primary features several Trump-backed candidates such as Byron Donalds for governor and Ashley Moody for Senate, while Michigan Republicans hold a nominating convention on August 22. Traders also monitor signals around potential 2028 positioning, though public statements indicate any early presidential endorsement remains unlikely before 2027 amid focus on the current midterm cycle and legislative agenda.