On Tuesday, President Trump’s efforts to remove Rep. Thomas Massie (R-Ky.) will reach a critical point as primary voters decide if the Republican Party still has space for a legislator who dares to openly oppose the president.
This contest has escalated to the most financially intense House primary in U.S. history, per AdImpact. A staggering $25.6 million has been spent on TV, radio, and digital ads, as national Republicans and external groups swarm Kentucky’s 4th Congressional District with scathing attack commercials.
“This is more than just a congressional primary; it’s a measure of Trump’s influence and voter turnout,” remarked TJ Litafik, a GOP strategist based in Kentucky, during an interview with The Hill. “It represents a significant internal struggle within the Republican Party.”
Massie, a libertarian Republican, drew Trump’s ire by opposing him on several key issues, transforming what was once a secure GOP primary into a personal political battle for the president.
In response, Trump endorsed Ed Gallrein, a retired Navy SEAL, as Massie’s challenger and even made a trip to Kentucky in March to encourage Republican voters to replace Massie, whom he has labeled as a “nutjob” and “the WORST Republican Congressman.”
“I just can’t stand this guy,” Trump told the crowd in Massie’s district in early March, adding, “We’ve got to get rid of this loser.”
For many Republican strategists, Tuesday’s primary will test whether Trump’s most aggressive campaign yet against a GOP dissenter — fueled by record-breaking spending and the weight of the party establishment — will be enough to defeat a contrarian congressman whose independent streak has helped keep him in office for more than a decade.
The primary comes after Trump successfully unseated nearly every Indiana GOP state senator he targeted for opposing a GOP-friendly mid-decade redistricting plan. The president has also targeted incumbent Sen. Bill Cassidy (R-La.) for, most recently, blocking Trump’s 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,” GOP strategist Ron Bonjean told The Hill.
“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,” he continued.
The race has garnered national attention, drawing outside surrogates and a record-breaking flood of money from national organizations.
The race’s $25.6 million in ad spending breaks the previous record set in New York’s 16th Congressional District primary in 2024, when spending reached $25.4 million, AdImpact reported at the time.
According to Federal Election Commission (FEC) data — which includes ad spending along with other campaign costs — the campaigns and political organizations working to influence the outcome of the election spent roughly $35 million.
Massie’s campaign outspent Gallrein’s, $5.8 million to $2.6 million, but super PACs heavily favored the GOP challenger.
In Massie’s corner, independent political groups spent more than $10.1 million supporting him — but super PACs poured more than $16.4 million into ousting the incumbent.
“It’s just tough to keep up with the money,” a Republican running a pro-Massie super PAC, who requested anonymity to speak freely, told The Hill.
But, he added, “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, said ad spending tends to matter most 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,” Skelley said. “Just to have this much concentrated spending against him is, I think, very helpful for the opposition.”
Many of the ad spots have turned vicious, including several AI-generated “deepfakes” targeting opponents’ perceived weaknesses. One pro-Gallrein super PAC released an ad depicting Massie holding hands with progressive Reps. Ilhan Omar (D-Minn.) and Alexandria Ocasio-Cortez (D-N.Y.) and claimed Massie was “caught in a throuple.”
A super PAC backing Massie, meanwhile, used AI in one ad to falsely depict Gallrein as a frightened soldier abandoning Trump on a battlefield, in an effort to undermine Gallrein’s MAGA credentials.
Massie’s criticism of Israel has also become a key issue in the race, with the incumbent repeatedly attacking pro-Israel groups like the Republican Jewish Coalition (RJC) 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 this past year as the libertarian congressman increasingly broke with the president on several high-profile issues.
But Massie has touted his voting record and pushed back against attacks on his conservative chops.
“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,” Massie said in an interview in February, after his fellow GOP Kentucky congressman backed Massie’s primary opponent.
“I don’t vote with them, and they want 100 percent compliance. That’s why they’re trying to take me out,” he continued.
Litafik said that “the 9 percent [of issues] that he hasn’t agreed with Trump on have been very important battles for Trump.”
Massie was one of four House Republicans who joined Democrats last summer in publicly calling for the president to release files related to convicted sex offender Jeffrey Epstein. They held press conferences with Epstein victims and rebuked the president for what they saw as insufficient action on the issue.
The Kentucky congressman has also broken with the president on foreign policy, and he declined to vote for Trump’s signature tax and spending bill last year because it increased government spending and raised the debt ceiling.
While Massie’s constituents have long favored the incumbent’s independent streak, the deep-red district now finds their congressman at odds with the president they backed by an overwhelming margin in 2024.
“When Trump is the sun and the moon and the stars in the Republican Party — and when the full weight of his machine is against you — it’s very tough to overcome,” Litafik said, noting the congressman still has “an incredibly loyal base” behind him.
“Republicans like fighters, but they also want team players,” he added. “And that’s the opening for Gallrein.”
Massie has faced primary opponents in the past, but Skelley said Tuesday will be “the biggest test that Massie has ever faced.”
Litafik contrasted the 4th Congressional District with Kentucky as a state at large, noting the Trump-endorsed candidate in the U.S. Senate race, Rep. Andy Barr, is “almost a sure winner.”
“But the 4th district is not the state at large,” Litafik said. “That’s why, despite all of this Herculean effort for Gallrein, Thomas Massie will be very tough to beat in his district.”