The limits of Donald Trump’s grip on the Republican Party were laid bare in Georgia this week, where a billionaire businessman with no political experience defeated the president’s hand-picked candidate for governor. Rick Jackson, a healthcare staffing magnate who poured more than $100 million of his own fortune into the race, overcame Lieutenant Governor Burt Jones in a runoff that had been widely expected to bolster Trump’s near-mythical endorsement streak. Jones, a seasoned officeholder backed not only by Trump but also by Georgia’s sitting Republican governor, Brian Kemp, entered the contest as the clear favourite. Yet Jackson’s self-styled outsider campaign—railing against career politicians and leaning heavily on his rags-to-riches biography—ultimately resonated more with primary voters, handing Trump a rare and conspicuous defeat in a cycle where his blessing has often proved decisive.

Viewed from Washington, the Georgia governor’s race was the most closely watched test of Trump’s influence, but it was not the only one. In the state’s Senate primary, Trump-backed congressman Mike Collins comfortably secured the Republican nomination to challenge Democratic Senator Jon Ossoff in November. Across the border in Alabama, another Trump-endorsed candidate, Representative Barry Moore, won a runoff to replace retiring Senator Tommy Tuberville, who is himself seeking the governorship. Moore, who also enjoyed the backing of Vice President JD Vance and Senate Majority Leader John Thune, defeated former Navy SEAL Jared Hudson in a contest that underscored the president’s continued ability to clear the field in deeply conservative territory.

Trump’s response to the Georgia setback was characteristically agile. Rather than dwell on the loss of his chosen candidate, he swiftly praised Jackson for running what he called “a great TRUMP campaign,” effectively claiming the billionaire’s outsider, anti-establishment message as an extension of his own political brand. Analysts in London note that this rhetorical pivot reveals a pragmatic streak: by framing Jackson’s victory as a triumph of Trumpism rather than a personal defeat, the president preserves his image as the defining force in Republican primaries. Jackson’s immense personal wealth—Forbes estimates his net worth at over $3 billion—allowed him to bypass traditional party gatekeepers, a dynamic that mirrors Trump’s own 2016 insurgency and suggests that the real threat to Trump’s kingmaker status may come not from ideological rivals but from wealthy populists who can outspend his chosen candidates.

Looking ahead to November, the mixed primary results carry distinct implications. In Alabama, Moore is virtually assured of victory in the general election, adding another Trump loyalist to the Senate. In Georgia, Collins faces a tougher climb against Democratic incumbent Jon Ossoff in a state that has become a perennial battleground. The governor’s race, however, now features Jackson as the Republican standard-bearer against a Democratic opponent yet to be determined. While Jackson’s self-funding capacity makes him formidable, his lack of political experience and the bruising primary could leave the party fractured. For Trump, the episode serves as a reminder that his endorsement, while still the most coveted in Republican politics, is not an unbreakable talisman—especially when a determined challenger can write cheques large enough to rewrite the script.