President Trump's campaign to remove Representative Thomas Massie from his Kentucky seat reaches its climax on Tuesday, as Republican primary voters decide whether there is space in the party for a lawmaker who openly defies the president. The contest has become the most expensive House primary in American history, with $25.6 million poured into television, radio, and digital advertising, according to AdImpact, as outside groups and national Republicans flood the district with harsh attack ads.
“It isn’t just a congressional primary. It’s a test of Trump’s strength and who turns out,” said TJ Litafik, a Kentucky-based GOP strategist, in an interview. “It’s a very epic battle in the Republican Party.”
Trump set his sights on Massie after the libertarian Republican broke with him on several high-profile issues, turning what was once a safe primary into a personal political vendetta. The president recruited and endorsed retired Navy SEAL Ed Gallrein, traveled to Kentucky in March to urge voters to oust Massie, and has publicly called him a “nutjob” who “will go down as the WORST Republican Congressman.” “I just can’t stand this guy,” Trump told a crowd in Massie’s district in early March. “We’ve got to get rid of this loser.”
For many strategists, Tuesday’s primary will test whether Trump’s most aggressive campaign against a GOP dissenter—fueled by record spending and the weight of the party establishment—can defeat a contrarian congressman whose independence has kept him in office for over a decade. This follows Trump’s success in unseating Indiana GOP state senators who opposed a redistricting plan, and his targeting of Senator Bill Cassidy for blocking his pick for surgeon general.
“What I think we’re all watching is, after Indiana, Trump showcased that he still has ironclad control of the Republican Party. The Massie primary would absolutely solidify whether or not that’s true,” said GOP strategist Ron Bonjean. “If Massie loses this primary, it absolutely shows Trump’s hold over it. And if he barely hangs on, it’s sort of a barometer of where Trump stands.”
The race has drawn national attention and a flood of outside money. The $25.6 million in ad spending breaks the previous record set in New York’s 16th Congressional District primary in 2024, which saw $25.4 million. Federal Election Commission data, which includes ad spending and other campaign costs, shows roughly $35 million spent by campaigns and political organizations. Massie’s campaign outspent Gallrein’s, $5.8 million to $2.6 million, but super PACs heavily favored the challenger. Independent groups spent more than $10.1 million supporting Massie, while super PACs poured over $16.4 million into ousting him.
“It’s just tough to keep up with the money,” said a Republican running a pro-Massie super PAC, who requested anonymity. “The fact that they’re spending $3 million in the final week tells me this is a nail-biter.”
Geoffrey Skelley, chief elections analyst at Decision Desk HQ, noted that ad spending is especially impactful in primaries. “When you’ve got this much money coming in that is arguing Massie is not MAGA, not a supporter of President Trump—and President Trump is such a dominating force within the Republican Party—just to have this much concentrated spending against him is, I think, very helpful for the opposition.”
Attack ads have turned vicious, with AI-generated deepfakes targeting opponents. One pro-Gallrein super PAC ad depicted Massie holding hands with progressive Representatives Ilhan Omar and Alexandria Ocasio-Cortez, claiming he was “caught in a throuple.” A pro-Massie super PAC used AI to falsely show Gallrein as a frightened soldier abandoning Trump on a battlefield, undermining his MAGA credentials. Massie’s criticism of Israel has also become a key issue, with the incumbent attacking groups like the Republican Jewish Coalition Victory Fund and the AIPAC-affiliated United Democracy Project, which account for nearly half of all super PAC spending against him.
Massie, who has long cultivated an independent streak, drew Trump’s ire by breaking with the president on several issues. He defends his record, saying, “I vote with the president 91 percent of the time. The 9 percent of the time, my party is taking up for pedophiles, bankrupting this country or starting another war.” The outcome on Tuesday will signal whether Trump’s grip on the GOP remains ironclad or faces cracks from within.
