Justice Neil Gorsuch turned what could have been a straightforward Supreme Court ruling on tariffs into a 46-page seminar on the limits of executive power, and in the process, he called out nearly every one of his colleagues by name.
The Supreme Court on Friday invoked the major questions doctrine to reject President Trump's sweeping assertion of his tariff authority under the 1977 International Emergency Economic Powers Act. The ruling itself was expected. What nobody anticipated was the solo opinion, more than twice as long as the main opinion, in which Gorsuch went camp by camp through the Court and told each faction where it had gone wrong.
William & Mary law professor Jonathan Adler described the exercise as something of a "Godfather-esque settling of family business." Conservative law professor Josh Blackman at the South Texas College of Law Houston had a simpler theory for why the decision took so long:
What took so long? The Chief probably wrote his majority opinion before breakfast. … I think the reason for the delay has to be Justice Gorsuch.
The major question doctrine holds that when an agency or executive claims vast new authority under an old statute, Congress must have spoken clearly to grant it. Courts don't simply defer to the executive's reading of ambiguous language when the stakes are enormous.
The doctrine has been the Court's most effective tool for reining in executive overreach in recent years:
According to The Hill, the pattern was the same each time: an administration reached into a decades-old statute and claimed powers that Congress never clearly granted. Each time, the Court said no.
Now the doctrine has been applied to tariff authority. And the interesting part is watching who suddenly likes it and who suddenly doesn't.
Gorsuch's core holding aligned with the majority. As he wrote:
Whatever else might be said about Congress's work in IEEPA, it did not clearly surrender to the President the sweeping tariff power he seeks to wield.
But Gorsuch wasn't content to leave it there. He surveyed the Court's various factions and found inconsistency everywhere. As he put it: "Not everyone sees it this way."
He started with the liberal justices, led by Justice Elena Kagan, who have long accused their conservative colleagues of inventing the doctrine. Kagan has called it "so-called" and suggested it appeared "magically" in the Court's jurisprudence. Yet on Friday, the liberal wing joined a ruling that relied on the very framework they've spent years attacking. Gorsuch noted the irony. Kagan was unmoved, writing that she remained no convert:
Given how strong his apparent desire for converts, I almost regret to inform him that I am not one. But that is the fact of the matter.
Then Gorsuch turned to Justice Amy Coney Barrett, who apparently did not appreciate the attention. Barrett fired back that Gorsuch had mischaracterized her position, writing simply: "He takes down a straw man."
The dissenters caught heat too. Justices Kavanaugh and Alito argued the doctrine shouldn't apply to foreign affairs. Justice Thomas went further in a solo dissent, opining it should only protect deprivations of life, liberty, or property and suggesting Congress may "hand over" most of its powers, including tariff power, to the president without limit. Gorsuch addressed Thomas directly:
Suppose for argument's sake that Congress can delegate its tariff powers to the President as completely as Justice Thomas suggests. Even then, the question remains whether Congress has given the President the tariff authority he claims in this case — or whether the President is seeking to exploit questionable statutory language to aggrandize his own power.
Only Chief Justice Roberts, in Gorsuch's estimation, stayed the course.
What Gorsuch was doing wasn't academic vanity. He was trying to lock down a principle before his colleagues could water it down from every direction. The major questions doctrine is the most important structural check on the administrative state to emerge from the Court in a generation. It says something foundational: Congress legislates, and the executive executes. When the executive claims powers of "vast economic and political significance," it needs a clear congressional mandate.
The left has hated this doctrine for years. Sen. Sheldon Whitehouse, a Rhode Island Democrat, captured the progressive view on the Senate floor in 2024:
There is enormous upheaval from that novel doctrine imported by the billionaire-selected justices of the Supreme Court into American law.
Yet when the same doctrine was used to check presidential tariff authority, the liberal justices suddenly found it useful enough to join the majority. Gorsuch described this as "an interesting turn of events." That's diplomatic for what it is: rank opportunism dressed up as principle.
And that's exactly Gorsuch's point. If the doctrine only applies when it's convenient, if liberals invoke it against Republican presidents and abandon it when Democrats want to cancel student debt, if conservative dissenters carve out foreign affairs exceptions whenever executive power serves their preferred policy outcomes, then the doctrine means nothing. It becomes a tool rather than a principle.
Gorsuch described the legislative process as a "bulwark of liberty." He's right. The entire constitutional design rests on the idea that sweeping policy changes require the slow, deliberate, often frustrating work of legislation. Not a unilateral pen stroke citing a 1977 statute that was never designed to reshape global trade.
President Trump will come face-to-face with the justices on Tuesday. Over the weekend, Trump took aim at several justices on social media and announced he would be using lowercase letters when writing "supreme court," citing "a complete lack of respect." When asked whether he would work with Congress on a tariff plan, Trump was direct: "I don't have to." He maintained he has the "right" to enact tariffs without Congress's help.
Andrew Morris, senior counsel at the New Civil Liberties Alliance and a representative of businesses challenging Trump's tariffs, noted where the real attention has fallen:
The opinion of the court, what it says about the major questions doctrine, everyone has had their eyes on.
Scott Lincicome, vice president of general economics at the Cato Institute, expressed concern about the practical fallout, particularly for small businesses:
I'm hoping that cooler heads prevail in the coming days, and the administration does make this as easy as possible, because if they don't, it will disproportionately burden small businesses that can't afford the lawyers and all the paperwork and the rest.
Victor Schwartz, owner of the wine importer VOS Selections that led the challenge, put the human cost plainly:
These duties were not like past tariffs set by Congress, which we could plan around. Instead, these tariffs were arbitrary and simply put, just bad business. They forced us to gamble with our livelihoods by trying to predict the unpredictable.
Conservatives should welcome Gorsuch's opinion even if the immediate policy outcome frustrates them. The major questions doctrine is not a weapon aimed at any one president. It is a structural restraint on every president, and on every bureaucracy that tries to govern by creative statutory interpretation rather than clear congressional authorization.
The same principle that blocked Biden's eviction moratorium, Obama's carbon regulations, and Biden's student debt amnesty now applies to tariff authority under IEEPA. That's not inconsistency. That's the doctrine working exactly as designed.
Gorsuch understands something his colleagues on both sides seem to forget when it's inconvenient: the separation of powers doesn't have a policy preference. It has a structure. And the structure holds, or it doesn't.
On Friday, it held.