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Supreme Court invalidates Trump's 2025 tariffs, triggering global trade shake-up
A landmark U.S. Supreme Court decision on Friday has thrown President Donald Trump's signature trade policy into disarray, prompting key Asian allies to reassess multi-billion-dollar investments and trade agreements with Washington.
Trump vows new 15% global tariffs
Following the ruling, Trump announced plans to impose a flat 15% tariff on all goods entering the U.S., replacing the now-illegal levies introduced in 2025. U.S. Customs and Border Protection confirmed on Monday that it would immediately halt collection of the disputed tariffs, which had sparked a global trade war.
Analysts warn that the new tariffs, while lower than some previous rates, introduce fresh instability. "The administration is still pushing for higher tariffs, regardless of the court's decision," said Adam Samdin of Oxford Economics. He noted that recent U.S. trade deals lack the legal safeguards of traditional agreements, leaving partners vulnerable to sudden policy shifts.
Asian economies scramble to adapt
Governments across Asia are urgently evaluating the fallout. China, preparing to host Trump in early April, stated it is "conducting a comprehensive assessment" of the ruling's impact. A Ministry of Commerce spokesperson reiterated Beijing's opposition to unilateral tariffs, calling trade wars "lose-lose" scenarios.
Japan, a key U.S. ally, said it would "carefully examine" the ruling and Trump's response. Itsunori Onodera, a senior lawmaker in Prime Minister Sanae Takaichi's party, expressed concern that the new tariffs could push nations away from the U.S. "As an ally, I'm worried this will accelerate that trend," he said on a Sunday TV program.
South Korea's Industry Minister Kim Jung-kwan highlighted uncertainty over potential refunds for tariffs already paid, though he confirmed that computer chips-critical to Seoul's economy-remain exempt from the new levies.
Mixed reactions from trade partners
Taiwan, another major chip exporter, said the ruling's impact appeared limited but pledged to monitor developments closely. Singapore, whose tariff rate was raised from 10% to 15%, said it would meet with U.S. officials to clarify implementation details. The city-state's trade ministry believes pharmaceuticals, electronics, and energy products may be spared.
U.S. Trade Representative Jamieson Greer downplayed concerns, telling ABC News that the ruling would not disrupt upcoming talks with China. "The purpose of this meeting is to maintain stability," he said, emphasizing agricultural purchases and Boeing orders. Greer later told CBS that no trade partners had signaled plans to withdraw from existing agreements, adding, "We expect our partners to stand by them."
Economic ripple effects
Countries like Indonesia and Taiwan had recently secured tariff reductions in exchange for billions in U.S. investments. Indonesia's rate dropped from 32% to 19%, while Taiwan's fell to 15%. Japan also finalized a 2025 deal to boost rare earth production with the U.S., aiming to reduce dependence on China.
Sandra Alday of the University of Sydney warned that the flat 15% rate would disproportionately hurt Asian economies exporting finished goods to the U.S. "Foreign products will generally become more expensive," she said, complicating supply chains for intermediate goods.
Legal and political questions linger
Trump's new tariffs rely on Section 122 of the Trade Act, a temporary measure requiring congressional approval within five months. The move has also raised concerns for the UK and Australia, which had negotiated 10% tariff deals with the U.S. under previous agreements.
With governments across Asia recalibrating their strategies, the ruling underscores the fragility of Trump's trade policy-and the high stakes for economies built on exports to the U.S.
