Ed Gallrein, a Trump-recruited farmer and former Navy SEAL, defeated incumbent representative Thomas Massie in Kentucky's 4th Congressional District Republican primary on Tuesday evening, ending Mr Massie's thirteen-year run in the House and delivering the president the most expensive scalp of his "vengeance tour" through the 2026 primary calendar.
With nearly all precincts reporting, Mr Gallrein led by roughly 14 percentage points. The race attracted more than $32 million in ad spending across the two campaigns, party committees and outside groups — the most ever recorded in a US House primary, eclipsing the previous record set in a Texas Democratic primary in 2024.
Mr Massie, an MIT-trained engineer first elected in 2012, fell into the president's crosshairs over two votes in particular: his public push for the release of the Jeffrey Epstein files and his lone-Republican opposition to the September authorisation of US military operations against Iran. The president travelled to northern Kentucky in March to rally for Mr Gallrein, dismissing the incumbent as "a third-rate grandstander".
The result deepens the consolidation of the House Republican conference around the president and removes one of the last reliable voices for civil-libertarian and non-interventionist positions on the GOP side. Mr Massie was the only House Republican to vote against this year's authorisation of force, and one of two to vote against the Pentagon supplemental.
Mr Gallrein has run as an unreserved Trump loyalist, promising to vote with the administration "100 per cent of the time" on national-security questions. He faces a token Democratic challenger in November in a district Mr Trump carried by 31 points in 2024.
Down-ballot Tuesday produced lower-profile but consistent signals: in Georgia, the Trump-endorsed candidate won the Republican nomination for the open 6th District seat; in Alabama, two House incumbents survived primary challenges without major drama. Strategists in both parties said the night reinforced the central political fact of 2026 — that on the Republican side, the president's endorsement remains decisive in nearly every race in which it is granted.