Section 301 Probes: US Targets 16 Asian Economies

What Are Section 301 Investigations and Why Do They Matter?

Section 301 of the Trade Act of 1974 is one of the most powerful trade tools in the US arsenal. It authorizes the US Trade Representative (USTR) to investigate and retaliate against unfair foreign trade practices, including manufacturing subsidies, intellectual property violations, and unreasonable trade barriers.

Crucially, these new Section 301 investigations replace IEEPA executive orders struck down by the Supreme Court. The Trump administration is pivoting to more legally durable grounds, with a formal investigation process that includes public comment periods and hearings. This means Section 301 tariffs, once imposed, will be significantly harder to challenge legally than the previous IEEPA tariffs.

If you work in Vietnam's export sector, this is an early warning signal. Section 301 has stronger legal footing and a more formal process, meaning new tariffs could persist much longer than previous measures.

16 Economies in the Crosshairs

On March 11-12, 2026, USTR announced two separate investigations. The first targets 16 economies for manufacturing overcapacity in strategic industries. The second, broader probe covers 60 economies for alleged failures to prevent forced labor goods imports. The scope covers virtually the entire Asian supply chain.

If you import components from Japan or South Korea for manufacturing in Vietnam then export to the US, your entire value chain is within scope of this investigation.

Vietnam's $50B Electronics Exposure: The Vulnerability

Vietnam's electronics exports to the US exceeded $50 billion in 2025, making it one of the most vulnerable nations to Section 301 investigations. This dramatic growth largely stems from multinational corporations shifting production from China to Vietnam to avoid previous tariffs, creating what Washington calls "manufacturing overcapacity" through foreign investment.

The complexity deepens as many "Made in Vietnam" products have relatively low domestic value-added content. Some products are merely assembled or final-packaged in Vietnam with components primarily from China. This is exactly the type of activity USTR is investigating: whether production shifts genuinely create value or merely serve as tariff circumvention.

If you work at Samsung, Foxconn, or electronics factories in Bac Ninh/Thai Nguyen, US-bound orders could be directly affected. Every 10% tariff could raise product prices by 15-20% due to supply chain cost amplification.

Industry Breakdown: Who Gets Hit Hardest?

The Section 301 investigation covers six strategic industries. Electronics and semiconductors represent the largest share at 42% of affected trade value, followed by automobiles and batteries (22%), solar energy (14%), steel and metals (12%), and chemicals (10%). Each industry has specific concerns about manufacturing overcapacity and government subsidies.

Vietnam's rapidly growing solar industry could face significant barriers. If you are investing in solar energy, factor tariff risks into export plans for US-bound solar panels.

Government Reactions: From Diplomacy to Defiance

Reactions from targeted nations have ranged from cooperation to outright defiance. Malaysia, one of the most forceful respondents, declared its US trade deal "null and void." This signals that some nations are willing to accept confrontation rather than capitulate to Washington's pressure.

Meanwhile, China warned of rare earth export curbs if Section 301 tariffs expand, according to Asia Times. Rare earths are essential materials for chip, battery, and electronics manufacturing. Any restrictions from China could disrupt global supply chains and create reverse pressure on US manufacturers themselves.

Vietnam is pursuing a more diplomatic approach, with bilateral negotiations to mitigate potential tariff rates. This could yield better outcomes for Vietnam compared to Malaysia's confrontational stance.

Investigation Timeline: Key Deadlines Ahead

If you are an export business owner, the April 15 deadline is your last chance to submit written comments to USTR. Registering to attend the Washington hearings should also be considered.

How Can Vietnam Prepare?

With approximately 5 months before new tariffs could take effect, Vietnam has a narrow window to act. The Ministry of Industry and Trade has established a special task force to coordinate with USTR and help businesses submit comments. However, long-term solutions require deeper structural economic transformation.

Every $1 million export order to the US could face an additional $100,000-$250,000 in new tariffs. Recalculate your profit margins now.

Three Economic Scenarios

US-Asia Decoupling: The Long-Term Trend

The Section 301 investigations are not an isolated event but part of an accelerating US-Asia economic decoupling trend. From the US-China "trade war" beginning in 2018 to semiconductor export controls and now Section 301 targeting the entire region, Washington is systematically reducing dependence on Asian supply chains.

For Vietnam, this is both a challenge and an opportunity. The challenge is that the "China + 1" model Vietnam has benefited from enormously over the past 5 years could be undermined if the US does not distinguish between genuine manufacturing and transshipment. The opportunity is that businesses investing deeply in domestic value-added, R&D, and brand building will have a significant competitive advantage in the new environment.

If your business only does contract manufacturing/assembly for US exports, this is the time to pivot. Investing in domestic design, research, and branding not only helps navigate tariffs but builds long-term value.

After the Hearings: What Comes Next?

After the hearings in late April and early May, USTR will enter a review and analysis phase. Under the Section 301 process, USTR can propose specific tariff rates for each industry and each country. The entire process from investigation to tariff implementation typically takes 5-12 months.

Key factors to watch: (1) Whether the US differentiates between countries or applies broad tariffs; (2) Specific rates for electronics and semiconductors, directly affecting Vietnam; (3) China's response regarding rare earths and trade retaliation; (4) Bilateral negotiations that could reduce rates for cooperative nations.

Vietnamese businesses should closely monitor the April 28 and May 5 hearing outcomes. Results will indicate whether USTR leans toward selective industry tariffs or broad country-wide tariffs.

Frequently Asked Questions