Why the Supreme Court Won’t Deter Trump’s Desire to Weaponize Trade

In a 6–3 decision, the U.S. Supreme Court ruled that the International Emergency Economic Powers Act (IEEPA) does not authorize President Donald Trump to impose sweeping tariffs.

While the ruling marks a significant legal setback for the White House, it is unlikely to fundamentally alter the administration’s broader trade strategy.

A Predictable Outcome — and a Prepared Administration

The tone of oral arguments months earlier signaled skepticism from several justices regarding the administration’s reliance on IEEPA. Markets and legal observers largely anticipated the outcome.

Importantly, administration officials had already indicated they were prepared with alternative legal justifications should the Court reject the emergency powers argument. Treasury Secretary Scott Bessent described tariffs as a cornerstone of Trump’s economic policy and pointed to other statutory authorities that could achieve similar ends.

Within hours of the ruling, the administration announced a new 10% global tariff under Section 122 of the Trade Act of 1974, a provision designed to address balance-of-payments concerns.

The Other Tools in the Toolbox

IEEPA was only one avenue. Several other trade statutes remain available:

• Section 301 of the Trade Act of 1974, which targets unfair trade practices. It has previously underpinned tariff battles, including disputes involving aerospace subsidies between the U.S. and the European Union.
• Section 232, which allows tariffs on national security grounds. Trump famously used it during his first term to impose steel and aluminum tariffs, and in his second term it has been applied to products ranging from automobiles to consumer goods.
• Section 122, which permits temporary tariffs lasting up to 150 days unless Congress extends them.
• Section 338 of the Smoot-Hawley Tariff Act, which authorizes tariffs of up to 50% against countries deemed to discriminate against U.S. commerce.

Among these, Section 338 may offer the broadest potential authority, particularly if trade imbalances are interpreted as evidence of discriminatory practices.

Structural Differences Matter

Unlike IEEPA, Sections 232 and 301 require formal investigations by the Commerce Department or the U.S. Trade Representative before tariffs can take effect. This procedural requirement slows implementation but does not eliminate executive flexibility.

IEEPA had allowed for more immediate action, including tariffs imposed on countries for reasons ranging from drug trafficking concerns to geopolitical disputes. Its use during the so-called “Liberation Day” reciprocal tariffs marked one of the most expansive attempts in modern history to reshape global trade relations.

The Supreme Court’s decision removes that specific fast-track mechanism — but it does not prevent the administration from pursuing similar objectives through other statutes.

Congressional and Political Constraints

One potential limitation lies in congressional oversight. Section 122 tariffs, for example, expire after 150 days unless extended by Congress. Recent House votes suggest that bipartisan coalitions could emerge to challenge broad tariff actions, though Senate dynamics and veto power complicate the outlook.

Still, as long as existing trade laws grant discretionary authority to the executive branch, a determined administration retains multiple pathways.

The Bigger Picture

The Court’s ruling narrows presidential authority under IEEPA, reaffirming constitutional limits. Yet from a policy perspective, it only closes one door.

For an administration that views market access as both leverage and deterrent — a tool to reshape supply chains, rebalance trade and exert geopolitical pressure — alternative statutory options remain viable.

In short, while the Supreme Court has curtailed one mechanism for unilateral tariff action, it has not fundamentally altered the broader landscape of U.S. trade power. The debate over how aggressively the executive branch can wield trade policy is far from settled.