25 states sue to overturn tariffs on 60 trading partners

Twenty-five Democratic-led US states filed suit Saturday challenging tariffs on goods from 60 trading partners, arguing the duties exceed the president's statutory authority and replace measures the Supreme Court already struck down.

The new tariffs are a substitute for measures the court rejected and bypass legally required country-specific investigations, the New York attorney general said in announcing the suit.

The lawsuit, filed in federal court, targets the administration's latest escalation of import duties covering goods from 60 trading partners. The states contend the tariffs are so broad they amount to an unlawful exercise of the taxing power, which the Constitution reserves to Congress. The challenge follows a Supreme Court ruling that struck down earlier tariff measures on similar grounds.

The case introduces fresh legal risk into US trade policy at a moment when businesses have already adjusted supply chains around existing duties. If the states prevail, tariffs on goods from 60 trading partners could be overturned, potentially lowering consumer prices and reshaping trade negotiations. A prolonged legal battle, however, could keep importers and exporters in limbo, affecting corporate earnings guidance and triggering retaliatory measures from trading partners.

The legal challenge marks the latest front in a widening battle over the president's use of tariff authority. The administration has argued the duties are a necessary tool to rebalance trade relationships and protect domestic industries. The states counter that Article I of the Constitution assigns the power to tax imports to Congress, not the executive branch, and that the president has overstepped that boundary.

The Supreme Court's earlier ruling, which struck down a previous round of tariffs, established a precedent the states now seek to extend. The new tariffs, the states argue, are functionally identical to those the court rejected — merely repackaged to avoid the specific defects identified in the ruling. The states also contend the administration failed to complete the country-specific investigations that trade law requires before imposing duties, a procedural defect they say invalidates the entire tariff program.

Specific tariff rates, the dollar value of affected trade, and the effective date of the new duties have not yet been disclosed in court filings. The lawsuit names the federal government as defendant, and the states are seeking an injunction to halt collection of the duties while the case proceeds.

Tariff relief or prolonged limbo

The lawsuit adds another layer of legal risk to an already strained trade environment. Import-dependent sectors — including retail, manufacturing, agriculture, and technology hardware — face the prospect of either tariff relief or prolonged legal limbo. Companies that have restructured supply chains around the current tariff regime could face disruption if the duties are overturned, while those that have absorbed higher costs could see margins recover.

Trading partners affected by the tariffs are watching the case closely. Some have already indicated willingness to retaliate if the duties remain in place, while others have paused negotiations pending the legal outcome. The case could also influence how other countries approach trade negotiations with the US, given the possibility that tariff measures could be invalidated by the courts.

The Supreme Court's schedule for the current term includes a separate tariff-related case, suggesting the judiciary will continue to play a central role in shaping US trade policy. The states' lawsuit is expected to move through the lower courts first, with a potential appeal to the Supreme Court likely to take months or longer. For businesses, that timeline means tariff costs — and the uncertainty around them — are likely to persist well into 2027.

This article is for informational purposes only and does not constitute investment advice.