The United States Supreme Court delivered a historic rebuke to President Donald Trump on Friday, ruling 6-3 that his sweeping tariffs imposed under a 1977 emergency law were unconstitutional. Chief Justice John Roberts, writing for the majority, held that the International Emergency Economic Powers Act (IEEPA) does not authorise the president to impose tariffs, as NBC News reported (February 20, 2026). The decision invalidates the most aggressive use of unilateral tariff authority by any president in modern American history.
The ruling struck down tariffs that had been applied to products from nearly every U.S. trading partner since Trump returned to office. According to SCOTUSblog (February 20, 2026), the court held that the Constitution assigns the power to set tariffs to Congress, and that no president had ever used IEEPA to impose import duties before Trump. Roberts wrote that the president pointed to no statute in which Congress had previously indicated that IEEPA's language could apply to tariffs.
The decision carried sweeping economic implications. CNBC (February 20, 2026) reported that the Penn Wharton Budget Model estimated $175 billion in potential refunds owed to importers who paid duties under the now-invalidated tariffs. The ruling was silent, however, on whether or how refunds should be processed, with Justice Brett Kavanaugh warning in his dissent that the refund process would likely be a mess.
Within hours of the ruling, Trump held a press conference in which he called the decision deeply disappointing and said he was ashamed of certain members of the court, including Justices Neil Gorsuch and Amy Coney Barrett — both his own appointees — who voted with the majority. As the Washington Post (February 20, 2026) reported, Trump then used a different law — Section 122 of the Trade Act of 1974 — to impose an immediate 10 percent across-the-board tariff on all imports.
However, the replacement tariff carries significant limitations. As OPB/Associated Press (February 20, 2026) noted, Section 122 tariffs can only remain in place for 150 days without congressional extension, and are capped at 15 percent — far less flexible than the unlimited authority Trump had claimed under IEEPA.
Treasury Secretary Scott Bessent sought to reassure markets, stating that the administration would invoke alternative legal authorities — including Section 232 and Section 301 — to replace the invalidated tariffs. NBC News reported that Bessent estimated these alternative authorities would result in virtually unchanged tariff revenue in 2026, though legal experts noted that Section 301 investigations require months of formal proceedings before duties can be imposed.
The fiscal implications are enormous. CNN (February 20, 2026) reported that the emergency tariffs had been projected to generate nearly $1.4 trillion in revenue over a decade, much of which was intended to offset the cost of the One Big Beautiful Bill Act tax cuts signed into law last summer. A 10 percent global tariff under the replacement authority would raise only about $800 billion over the same period, creating a significant fiscal shortfall.
The agricultural sector faces particular uncertainty. American farmers had already lost billions during the trade war with China before the October 2025 deal that secured soybean purchase commitments. NPR (February 21, 2026) reported that gross domestic product grew 2.2 percent in 2025 despite the tariffs, but noted that imports did not decline — suggesting the tariffs were primarily raising costs for American businesses and consumers rather than reshoring production.
The ruling invoked the major questions doctrine — the same legal principle the court used to block President Biden's student loan forgiveness plan — holding that Congress must explicitly authorise policies with major nationwide economic impact. As CNN's legal analysis noted, the average U.S. tariff rate had risen from 2.5 percent when Trump returned to office to nearly 17 percent — the highest since 1934 — according to Yale University's Budget Lab.
For global food markets, the ruling introduces a period of profound trade uncertainty. While existing tariffs under other statutes — including duties on Chinese goods under Section 301 — remain in effect, the invalidation of the broadest tariffs could ease import costs on agricultural inputs, food products, and packaging materials. For food-importing nations like Nigeria, any reduction in U.S. trade barriers could shift global commodity flows and ease pressure on international food prices, though the administration's determination to reimpose duties under alternative authorities means the full impact remains unclear.