CHINA-ECONOMY
A worker polishes parts at a manufacturing company in Hangzhou, in eastern China's Zhejiang province, on June 23, 2026.

The great manufacturing migration out of China was supposed to be settled. Over the past few years, companies moved electronics assembly to Vietnam and battery and nickel processing to Indonesia, hardening the "China plus one" strategy into something close to permanent supply chains. Then, this winter, the legal ground under the whole arrangement shifted.

On February 20, 2026, the Supreme Court ruled 6 to 3 that the emergency law the White House had used to impose its sweeping "reciprocal" tariffs did not actually authorize them. Writing for the majority, Chief Justice John Roberts concluded that imposing such tariffs is "a branch of the taxing power" reserved to Congress, according to Holland & Knight's analysis. Customs and Border Protection stopped collecting the tariffs days later. The lower court that first heard the case had called the measures unbounded in scope, amount and duration.

That mattered enormously for Southeast Asia, because the tariffs that shaped the region's windfall were built on the law the Court just rejected. Vietnam had negotiated its exposure down to a 20% rate under a 2025 bilateral deal, paired with a 40% penalty on goods merely transshipped through the country to disguise Chinese origin, terms that had forced manufacturers to prove real local content, as trade analysts detailed. With the legal basis for those rates struck down, the durability of the deals negotiated under that pressure is now uncertain, even though the administration is unlikely to unwind them voluntarily.

Washington did not retreat. Within hours of the ruling, the White House imposed a 10% global tariff under a different statute, Section 122 of the Trade Act of 1974, and signaled it wanted to push that to 15%. In March, the U.S. Trade Representative opened Section 301 investigations into "structural excess capacity" in manufacturing across 16 economies, a list that pointedly includes Vietnam, Indonesia, Malaysia and Thailand alongside China, according to BDO. In other words, the tariff wall did not fall so much as get rebuilt with different bricks, and the new investigations take direct aim at the China+1 winners.

Underneath the legal turbulence, the migration itself has kept going, and the numbers explain why companies are not turning back. U.S. goods trade with Southeast Asia surged through 2025 despite the tariffs, with the trade deficit rising 11% with Indonesia and 23% with Thailand as manufacturers kept shipping, Al Jazeera reported using census data. Vietnam has climbed into the ranks of America's top chip suppliers, riding the same AI-driven semiconductor demand lifting the rest of Asia. Trade expert Deborah Elms, quoted by Al Jazeera, noted the president's clear "desire to have the trade deficits shrink," even as the deficits with these hubs kept widening.

The two anchor countries have specialized. Vietnam owns the electronics story, hosting expansions from contract manufacturers like Foxconn and Flex as they build out capacity beyond China. Indonesia's edge is geology: it holds some of the world's largest nickel reserves, the critical input for EV batteries, and has leveraged that resource to pull in battery and vehicle investment. Chinese automaker BYD committed $1.3 billion to Indonesia and Vietnamese manufacturer VinFast pledged $1.2 billion, according to ASEAN Exchanges. McKinsey has projected Indonesia could account for 43% of Southeast Asia's battery-production capacity by 2030, cementing its place in the EV supply chain.

For American households, the through-line is prices. Tariffs are a tax on imports, and much of what fills U.S. store shelves and factory floors now routes through exactly these countries. Even with the reciprocal tariffs gone, the Yale Budget Lab estimates the overall average effective U.S. tariff rate sits around 9.1%, the highest since 1946 apart from the 2025 peak, per its analysis. That elevated baseline feeds into the cost of electronics, appliances, vehicles and countless components, which is why a trade-law fight that sounds abstract eventually shows up in consumer budgets.

The situation also created an unusual wrinkle: importers that paid the invalidated tariffs may be entitled to refunds, though the mechanics have not been announced and are expected to be complicated. Businesses caught in the shift are being advised to review their tariff exposure, verify the origin and classification of their goods, and build flexibility into sourcing, because the volatility is not over.

For readers, the practical takeaway is less about any single action than about watching the right signals. The prices of imported electronics, cars and appliances will move with how the new Section 122 and Section 301 measures land, and with whether the bilateral deals struck under the old regime hold. Shoppers weighing a large purchase of an import-heavy product may want to factor in that tariff policy remains unusually fluid rather than assuming today's price is locked in.

What happens next runs through Washington more than through Hanoi or Jakarta. The Section 301 investigations will determine whether a new, more legally durable set of tariffs lands on the China+1 hubs. Congress could, in theory, reclaim and reshape tariff authority the Court said belongs to it. And the refund process for invalidated duties will test how much of the 2025 tariff bill actually gets returned. The factories have moved and are not moving back. The rules governing what it costs to buy what they make are still being written.

This article is general information and is not financial, tax, legal, or investment advice.

Originally published on Money Times