Thomas Massie — the Republican congressman from Kentucky’s Fourth District — is an M.I.T.-trained engineer, inventor, cattle farmer, libertarian, deficit hawk and skeptic of foreign aid and foreign wars. He is also, in the view of President Trump, “a complete and total disaster” who should be removed from office as soon as possible.
Their falling-out wasn’t a forgone conclusion. Mr. Massie votes with his party 91 percent of the time. He shares MAGA’s distrust of the administrative state and MAHA’s suspicion that federal health and agriculture bureaucracies are too cozy with the industries they regulate. He was drinking raw milk before Robert F. Kennedy Jr. made it cool.
But the overlap has limits, especially on trade, spending and executive power. And above all, Mr. Massie is against being told what to do and refuses to submit to the final test: unquestioning loyalty to the president. Mr. Trump recently called him “disloyal to the United States of America,” but what the president really meant was that he wasn’t sufficiently loyal to Mr. Trump. His independent streak is what makes him so irritating to his party, and so useful to it.
A movement that cannot tolerate a Thomas Massie has become exactly what its critics say it is — a personality cult with principles grafted on after the fact.
On Tax Day, I spent a couple of hours on Capitol Hill with Mr. Massie, and walked away convinced that America needs more Massies in Congress. He is the kind of libertarian-conservative that used to be, if not standard, at least not so unusual in the G.O.P. Congressional libertarians have traditionally tried to act as brakes on the machinery of the federal government, slowing its expansion in size and spending, regardless of who is in the Oval Office.
Libertarians have correctly identified many of the dangers posed to Americans by the decisions of our government since Sept. 11, 2001 — the growth of the surveillance state, endless wars, catastrophic debt and deficits, overreach by the executive branch — and won few friends and fewer elections as a result.
Now Mr. Massie is one of a vanishing breed — and we are seeing the cost of that to the country unfold before our eyes.
Mr. Massie is best understood as a throwback to the early Republic. He is a Jeffersonian agrarian who also wears a homemade electronic lapel pin that displays the national debt in real time.
Before he entered Congress in 2012, he earned degrees in electrical and mechanical engineering and founded SensAble Technologies, a haptics company, with his first wife, Rhonda, who died in 2024. SensAble raised more than $32 million in venture capital, created 70 jobs and obtained 29 patents, according to his House biography.
He goes by Thomas, not Tom. Like Jefferson, he says. He likes Jefferson. “When I visit Monticello,” he told me, “I think about the things that he thought about and wonder how I would have done it differently.” Mostly, Mr. Massie concluded, Jefferson needed better tools: “He would just be in heaven if he could be here today with a bulldozer and a sawmill. And plastic pipe.”
To construct his own house in Kentucky, Mr. Massie built a sawmill, cut the lumber himself and used stone from the farm. He powers the place off the grid, including with a repurposed Tesla battery.
His entry point into politics was, ironically, the desire to be left alone. He showed up to a meeting to oppose new zoning regulations and ended up getting voted in shortly thereafter as Lewis County judge executive, starting an inadvertent career in elected office.
Stories about Mr. Massie have the feel of tall tales but frequently turn out to be true. The solar-powered mobile chicken coop, a.k.a. the Clucks Capacitor, is designed to move an inch an hour so the chickens always have fresh grass. Then there was the neighbor who asked him for help hiding distilling equipment. (Mr. Massie says he told him he could not get caught up in anything illegal, but that if the man kept driving, there was an old tobacco barn that “rarely gets visited.” He heard the truck go back and forth two more times. “I never saw the equipment,” he told me. “And nobody went to jail.”)
This is not exactly the standard résumé for a member of the House Judiciary Committee. “I’m on the Judiciary Committee because I know about patents,” he told me. “Not because I’m a lawyer — because I’m not a lawyer.” He is there, he says, to represent “small tech and garage inventors.”
Once Mr. Massie locks in on the technical details of a topic, it’s hard to shake him out of it, a common trait in an engineer and an unusual one in a politician. “In electrical engineering, if you have a circuit board,” he said, “if it’s got a thousand wires in it, and one of them’s not connected, then the whole board is junk.” That focus, he added, is “how we get the Epstein Files Transparency Act passed.”
The Epstein files were the fight that transformed Mr. Massie from one of Mr. Trump’s occasional Republican irritants into a declared enemy. The issue brought together several things Mr. Trump hates: a Republican acting independently; a procedural maneuver the White House could not easily control; and a persistently troubling topic MAGA had promised to resolve before suddenly deciding there was not much to see.
For years, Mr. Massie told me, he thought the Epstein files were probably “an internet conspiracy” he did not have time to investigate. Then the Trump administration released binders that seemed to him to contain nothing much at all. Why are they going to these lengths to pretend they’d released something they hadn’t? he wondered.
The question stayed with him. So did the testimony of Epstein survivors. It “was like a level of evil I hadn’t even contemplated,” he told me.
Mr. Massie reshaped his legislative priorities accordingly — and bent his considerable technical skills to a moral crusade. He and Representative Ro Khanna, Democrat of California, pursued a discharge petition not on a bill, he explained, but on a rule. He had served on the Rules Committee, and knew the power it held.
The maneuver put them, and Congress, on the road to requiring the Justice Department to release the files. A century from now, he said, if the Justice Department finds something with Mr. Epstein’s name on it, “they have 30 days to release it in a public searchable format.” That, he said, is “the cool thing about it.”
This desire for lasting transparency is also why he votes no so often. Mr. Massie has frequently been the lone no vote on sanctions, foreign-policy resolutions and symbolic condemnations that most members would rather pass quickly and forget. His critics describe this as obstructionism or contrarianism. He sees it differently.
His theory is that the lone no vote forces everyone to ask what was in the bill or resolution, or ask questions about, say, spending, as in Mr. Trump’s 2025 One Big Beautiful Bill. He was one of two House Republicans to vote against it.
When Mr. Trump endorsed Mr. Massie’s primary challenger, Ed Gallrein, a former Navy SEAL, in March, Mr. Massie’s official response was more amused than alarmed.
When Mr. Trump called him a moron at the National Prayer Breakfast, Mr. Massie replied, “I’m glad I’m in his prayers.”
Mr. Trump has also gone after Mr. Massie’s late wife and his new wife, Carolyn. “He found a way to insult my late wife and my new bride and me at the same time,” Mr. Massie told me. But Carolyn, he said, laughed it off. She had tried to persuade him to invite Mr. Trump to their wedding. After Mr. Trump attacked the marriage, she told him, “I told you we should have invited him.”
The Kentucky primary is next week. In 2024, Mr. Trump won the district with 68 percent of the vote. An early April Quantus Insights poll showed Mr. Massie ahead 47 to 38 percent, with 14 percent undecided.
Mr. Massie argues that the race is not really about Mr. Trump, and not only about him. He says the primary challenge against him is also driven by his refusal to support foreign aid and pro-Israel resolutions that he believes compromise the First Amendment or commit the United States to another country’s wars.
Kentucky Trump supporters are being asked to turn on a congressman many of them have voted for again and again. They have kept voting for him because, even if they don’t always agree with him, he represents something real about Kentucky — and about America. It’s a proud American tradition to send representatives to tell an overstepping head of state to buzz off, starting with the Second Continental Congress in 1775-76.
That libertarian urge explains the off-grid house, the homemade debt lapel pin, the no votes, the suspicion of federal power, the procedural obsessiveness and the willingness to annoy his own side. This kind of independence is deeply American, and increasingly scarce on Capitol Hill.
Recently, Mr. Massie confessed, he let himself think about what it would be like if he lost. He loves his job, and he’s clearly a natural politician.
But if the voters of Kentucky’s Fourth Congressional District send him home, he said, “nobody will ever hear from me again.” He will not run for president, or Senate, or governor. He will disappear back to the farm to work on a few new patent ideas. He’d like to build Carolyn a flower bed.
Congress, and the Republican Party, would be worse off without the friction and clarity Mr. Massie provides.
For most politicians, losing an election is a kind of death. For Mr. Massie, it may be the other way around: the end of bad days as Washington understands them, and the return to the freedom he has spent his career fighting for.
Katherine Mangu-Ward is the editor in chief of Reason.
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