25 US states sue Trump administration over sweeping new tariffs

Legal challenge to presidential tariff authority

A coalition of 25 US states has filed a lawsuit against the Trump administration, seeking to block new tariffs imposed on 60 trading partners. The legal action, led by Democratic attorneys general, argues that the tariffs exceed the president's authority under the International Emergency Economic Powers Act (IEEPA).

The states contend that the administration's use of emergency powers to impose sweeping import duties is unlawful, as the statute is intended to address national security threats, not trade imbalances. The lawsuit was filed in a federal court, though the specific jurisdiction has not been confirmed.

The tariffs, announced earlier this week, cover a wide range of goods from dozens of countries, including major US trading partners in Asia, Europe, and the Americas. Officials from the affected states have said the measures could raise consumer prices and disrupt supply chains that rely on imported materials.

Background: a pattern of tariff escalation

The new tariffs represent the latest in a series of trade actions taken by the Trump administration since it returned to office. Previous rounds targeted specific sectors such as steel, aluminium, and electronics, but this broader wave affects a significantly larger number of nations.

The White House has defended the tariffs as necessary to protect domestic industries and reduce the US trade deficit. In a statement, administration officials said the measures are designed to counter unfair trade practices and that the president has the legal authority to act under IEEPA, which allows emergency economic powers when there is an "unusual and extraordinary threat."

However, legal experts note that past courts have rarely upheld IEEPA-based tariffs when challenged, citing the 2023 Supreme Court ruling in West Virginia v. EPA that limited executive agency overreach. That precedent, known as the "major questions doctrine," could play a central role in this case.

Why this lawsuit matters

The lawsuit is significant not only for its scale—25 states representing a major share of the US economy—but also for its potential to redefine the balance of power between the executive and legislative branches on trade policy. If the court rules against the administration, it could force the president to seek congressional approval for future tariffs, a process that is politically fraught and time-consuming.

Economists have warned that the tariffs could have a ripple effect on global markets, particularly in developing countries that export heavily to the US. India, for instance, faces potential duties on textiles, pharmaceuticals, and information technology services, which could impact its export-driven sectors.

The states behind the lawsuit include California, New York, Illinois, and Washington, among others. Their attorneys general have argued that the tariffs will harm state economies by increasing costs for businesses and consumers, and by triggering retaliatory measures from affected countries.

What to watch

The immediate next step is a hearing on the states' request for a preliminary injunction to halt the tariffs while the case proceeds. Such injunctions have been granted in similar cases, but the administration is expected to argue that delaying the tariffs would cause irreparable harm to national security.

The case is likely to move quickly through the federal courts, with many analysts predicting an eventual appeal to the Supreme Court. A ruling either way could have profound implications for US trade policy, affecting everything from the price of consumer goods to the stability of global supply chains.

Internationally, trading partners are watching closely. Several countries, including China and members of the European Union, have already announced plans to challenge the tariffs through the World Trade Organisation. The outcome of the US lawsuit could influence whether those challenges proceed or are put on hold.

For now, the legal battle is set to unfold over the coming months, with both sides digging in. The court's decision will not only determine the fate of these tariffs but also set a precedent for how future presidents can wield emergency economic powers.