Judges must exercise power according to their own conception of the Constitution's moral authority
In a moment that recalls the oldest tensions between executive ambition and constitutional design, the United States Supreme Court ruled this week that no president — not even one who shaped the Court's current composition — may impose sweeping tariffs on global trade without the consent of Congress. The 6-to-3 decision, notable for the defection of two Trump-appointed justices, reaffirms that the power to tax belongs to the legislature, not the executive. It is a ruling less about tariffs than about the durability of institutional checks when tested by concentrated political will.
- Trump's signature second-term weapon — the unilateral tariff — has been struck from his hands by the very Court he helped build, creating an immediate strategic vacuum in his approach to China and global trade.
- The 6-to-3 split exposed a fracture within the conservative legal bloc, as Gorsuch and Barrett chose constitutional principle over presidential loyalty, rattling the assumption that appointed justices reliably serve their patron's agenda.
- Global markets and multinational corporations, long unnerved by the volatility of executive trade decrees, now have a measure of predictability: American trade policy must pass through Congress before it can reshape commerce.
- Trump must now negotiate with a Republican-controlled Congress where unanimity is never assured, transforming tariffs from a presidential tool into a legislative bargaining chip with uncertain outcomes.
- The White House is weighing its options — including the historical precedent of Roosevelt's failed Court-packing attempt — as the 2026 midterms loom as the next arena where this power struggle will be tested.
The Supreme Court drew a constitutional boundary this week that Donald Trump cannot cross alone. In a 6-to-3 ruling, the justices held that the president lacks the authority to impose sweeping tariffs on global commerce without congressional approval — a decision made more striking by the fact that two of Trump's own nominees, Neil Gorsuch and Amy Coney Barrett, joined Chief Justice Roberts and the Court's three liberal members in the majority. The dissenters — Kavanaugh, Thomas, and Alito — argued the tariffs were permissible under existing law, but the majority held firm: the Constitution's framers assigned the taxing power to Congress, not the executive.
The ruling strikes at the heart of Trump's second-term strategy, which has relied heavily on tariffs as leverage against China and other trading partners. Without the ability to act unilaterally, the president must now bring Congress into negotiations — a body his party controls but cannot always command. For the global business community, the decision offers something tariffs rarely do: stability. American markets will no longer open or close at presidential whim, and that predictability may prove more economically valuable than any single trade measure.
What the ruling also demonstrated is the quiet power of judicial independence. Gorsuch and Barrett, despite owing their seats to Trump, voted according to their reading of the law rather than the preferences of the man who appointed them. That willingness to rule against one's patron is not a betrayal of the appointing process — it is the process working as designed.
Historians will find echoes here of 1935, when the Court unanimously dismantled key pillars of Roosevelt's New Deal. Roosevelt responded by threatening to expand the Court. Whether Trump's advisors are revisiting that chapter is an open question — but the 2026 midterms will soon reveal how much political capital remains to reshape what this ruling has constrained.
The Supreme Court has drawn a line that Donald Trump cannot cross alone. In a decision that split his own appointees from his preferred outcome, the Court ruled this week that the president cannot impose sweeping tariffs on global commerce without permission from Congress. The vote was 6 to 3, with two justices Trump nominated—Neil Gorsuch and Amy Coney Barrett—joining Chief Justice John Roberts and the Court's three liberal members to block the executive overreach. The three dissenters, Brett Kavanaugh, Clarence Thomas, and Samuel Alito, all appointed by Republican presidents, argued the tariffs were plainly legal under existing law.
Roberts, writing for the majority, was direct: the Constitution's framers gave no part of the taxing power to the executive branch. Kavanaugh, in dissent, countered that whatever one thinks of Trump's tariff policy as strategy, the text and history of the law clearly permit it. The disagreement was not about facts or even constitutional interpretation in the narrow sense—it was about whether a president can use trade as a tool of geopolitical pressure without legislative restraint.
This matters because Trump has built much of his second-term strategy around tariffs as leverage against China and other trading partners. The ruling forces him to negotiate with Congress, a body his party controls but where unanimity is never guaranteed. It also means that American companies seeking to do business globally, and foreign firms eyeing the American market, now have more predictability. A president cannot wake up and remake the entire trade landscape by executive decree.
The decision echoes a deeper question about how judges should interpret the Constitution when they sit on the bench. Ronald Dworkin, the late legal philosopher, argued that judges must exercise their power according to general principles drawn from their own conception of the Constitution's moral authority. That is what happened here: Gorsuch and Barrett, despite owing their seats to Trump, voted according to what they believed the law required, not what the president wanted. It is a reminder that judicial independence—the willingness of judges to rule against the hand that appointed them—remains one of Washington's greatest assets in attracting global investment and maintaining institutional credibility.
The practical consequences are significant. Without unilateral tariff power, Trump's inflation-fighting strategy becomes more complicated. His leverage over China is constrained. But the global business community gains clarity: American markets will not be closed or opened on presidential whim. That stability, paradoxically, may help the economy more than tariffs ever could.
Historians will note the parallel to Franklin Roosevelt's clash with the Supreme Court in 1935, when the justices unanimously struck down key pieces of the New Deal. Roosevelt later tried to pack the Court with friendly justices. Trump's advisors are likely reviewing that history now, wondering whether the current Court can be reshaped or whether this is simply the price of a system built to resist concentrated power. The 2026 midterm elections in November will test whether Trump can maintain his congressional majority and, if so, what he might do with it.
Citações Notáveis
The framers of the Constitution did not grant any part of the taxing power to the executive branch— Chief Justice John Roberts, writing for the majority
The tariffs in question may or may not be sound policy, but by the text, history, and precedent, they are plainly legal— Justice Brett Kavanaugh, in dissent
A Conversa do Hearth Outra perspectiva sobre a história
Why did Trump's own appointees vote against him on this?
Because they were asked to interpret the Constitution, not to serve the president who appointed them. Gorsuch and Barrett apparently believed the law was clear—Congress controls the power to tax and regulate trade. That's what the document says.
But doesn't that seem naive? Don't judges always vote their ideology?
Sometimes they do. But this case shows something else: that institutional loyalty—to the Court itself, to the rule of law—can override partisan loyalty. Roberts joined them. That's six votes, a real majority, not a squeaker.
What does this actually change for Trump's China strategy?
It means he can't just impose tariffs by fiat anymore. He has to convince Congress. That's harder, slower, messier. But it also means any tariffs he does get will have more legitimacy and staying power.
Is this a win or a loss for him?
It's a loss on the specific question of executive power. But it might be a win for America's credibility abroad. Foreign investors want to know the rules won't change with the president's mood. This decision gives them that assurance.
What about the three dissenters? Are they just Trump loyalists?
Kavanaugh's dissent was legally serious. He wasn't saying Trump's tariffs are good policy—he was saying the Constitution permits them. That's a real argument, even if the majority disagreed. The difference is that Gorsuch and Barrett chose principle over loyalty.
Will Trump try to change the Court again?
That's the question everyone's asking. He has the presidency and Congress. Whether he has the political will to attempt another Court-packing scheme—that's what the next few years will tell us.