Washington Expands China Trade Probes as Tehran Crisis Splits U.S. Focus
New Section 301 investigations target 16 economies while Treasury negotiates in Paris, exposing strategic bandwidth limits amid Middle East war.
The Trump administration launched Section 301 trade investigations into China and 15 other economies on March 11, the broadest such action in decades, even as U.S. Treasury Secretary Scott Bessent sat down with Chinese Vice Premier He Lifeng in Paris to negotiate ahead of a planned Trump-Xi summit. The twin-track approach—escalation through formal probes while pursuing dialogue—reveals Washington’s attempt to maintain economic pressure on Beijing while its military and diplomatic apparatus remains consumed by the expanding conflict with Iran.
U.S. Trade Representative Jamieson Greer announced investigations under Section 301 of the Trade Act of 1974 into China, the European Union, Mexico, and 13 other economies, focusing on what the administration terms “structural excess capacity and production in manufacturing sectors.” The investigations could pave the way to re-impose tariffs struck down by the Supreme Court in February, when justices ruled the president exceeded authority under the International Emergency Economic Powers Act.
Timing Signals Strategic Calculus
The March 11 announcement came as Israel and the United States continued strikes against Iran that began February 28, aimed at regime change and targeting Iran’s nuclear and ballistic missile programme. Oil markets have responded violently: Brent crude rose from $72 per barrel pre-conflict to $106.81 on March 8—the first time above $100 in nearly four years. Tanker traffic through the Strait of Hormuz has effectively halted as ship owners worry about security, threatening about 20% of global oil consumption.
China has condemned the strikes while maintaining studied ambiguity about Iranian retaliation. Beijing is a close partner of Tehran but has also criticised Iranian strikes against Gulf states hosting U.S. forces. The Iran war now frames U.S.-China economic talks: the Strait of Hormuz closure will likely feature in Paris negotiations, as China gets 45% of its oil through the waterway.
Agriculture Takes the Hit
The human cost of the trade war remains concentrated in the U.S. farm belt. China essentially stopped buying U.S. exports in April 2025, causing shipments to fall to levels not seen since the 2008-09 financial crisis. By year-end, U.S. exports of goods to China were 26% lower than 2024 in nominal terms.
Soybeans—historically America’s largest agricultural export to China—suffered catastrophic declines. The crop made up 50% of agricultural sales to China in 2024, with one in three rows of U.S. soybeans ending up in China under normal trade flows, but exports fell to $3 billion in 2025, the lowest since 2018. China has actively reduced dependence on U.S. farmers by buying from Brazil and Argentina, with 80% of Chinese soybean imports now coming from those countries, up from 60% in 2017.
Washington has responded with subsidies rather than tariff relief. The Trump administration announced up to $11 billion in payments to farmers affected by “temporary trade market disruptions,” with disbursements beginning February 28, 2026—echoing the $28 billion sent to farmers hurt by 2018-19 tariff retaliation.
Semiconductor Supply Chains Under Stress
Beyond Agriculture, the technology sector faces deepening fragmentation. U.S. firms could lose about $77 billion in semiconductor sales in the initial year after hypothetical full decoupling with China, with South Korean firms gaining $21 billion, EU firms $15 billion, and Taiwanese firms $14 billion, according to economic modelling from the Information Technology and Innovation Foundation.
The revenue loss translates directly into innovation capacity. U.S. industry R&D investments in Semiconductors could decrease by about 24%, or $14 billion, compared with the status quo after full decoupling. The Chinese government has responded by accelerating its national strategy to achieve semiconductor self-reliance, channelling resources into domestic capabilities through the National Integrated Circuit Industry Investment Fund.
Paris Talks: Narrow Bandwidth
U.S. and Chinese economic officials held “remarkably stable” talks in Paris on March 15 that touched on potential areas of agreement in agriculture, critical minerals and managed trade, setting in motion possible “deliverables” for Trump’s trip to China, according to two sources familiar with the discussions who spoke to CNBC.
But expectations remain deliberately modest. Deliverables have likely narrowed to commercial purchases such as soybeans rather than any grand bargain, with leaders expected to frame the meeting as the opening of a longer conversation across 2026, according to Deborah Elms, head of Trade Policy at Hinrich Foundation. Analysts note that with little time to prepare and Washington’s attention focused on the Iran war, prospects for significant breakthroughs are limited, reported via Al Jazeera.
The bandwidth constraint is real. The U.S. Defense Department released the names of six service members who died when their military refueling aircraft crashed during Iran operations, while Israel informed the U.S. it is running critically low on ballistic missile interceptors, according to Al Jazeera and Semafor.
- Section 301 investigations provide legal pathway to restore tariffs after Supreme Court struck down IEEPA authority in February 2026.
- U.S. agricultural exports to China remain 26% below 2024 levels despite November truce; China has structurally shifted soybean sourcing to South America.
- Semiconductor decoupling could cost U.S. firms $77 billion in annual sales and reduce R&D spending by 24%, accelerating innovation loss.
- Iran war consumes U.S. diplomatic and military bandwidth, limiting capacity for comprehensive China negotiations beyond narrow commercial deals.
BRICS Watches, Waits
China’s response to U.S. trade pressure increasingly operates through multilateral channels. BRICS expanded in 2026 to 11 member countries including Brazil, Russia, India, China, South Africa, Saudi Arabia, UAE, Iran, Egypt, Ethiopia, and Indonesia. While India remains unconvinced about a common BRICS currency, the push for de-dollarisation and settling trade in national currencies is gaining momentum as a direct response to unilateral sanctions.
India’s 2026 BRICS chairmanship complicates U.S. strategy. French Minister Jean-Noël Barrot noted that France heads the G7 while India chairs BRICS, with President Macron stating “BRICS countries must not become anti-G7 and G7 must not become anti-BRICS”—a recognition that forcing binary choices may backfire.
The Iran dimension adds urgency. BRICS now includes Iran among its 11 members, creating a formal diplomatic channel for coordination on sanctions evasion and alternative payment systems. BRICS members account for around 40% of global GDP in purchasing power parity terms, according to data from Brazil’s 2025 BRICS presidency.
What to Watch
Section 301 timeline: USTR will hold hearings on investigations from April 28 to May 1—an “unrealistically short” timeline given the breadth of countries under scrutiny, according to trade policy experts. Completion before the Section 122 tariff expires in 150 days would restore administration leverage.
Trump-Xi deliverables: The Chinese side showed openness to potential additional purchases of U.S. agricultural goods, but future purchase commitments covering 2026-28 were characterised by industry as “below the status quo” even in the November agreement.
Iran Conflict duration: Extended disruption of Hormuz transit fundamentally alters China’s energy security calculus and reduces Beijing’s flexibility on U.S. economic demands. Bessent announced a 30-day waiver of sanctions to allow sale of Russian oil stranded at sea, signalling Washington’s recognition that energy price spikes constrain its negotiating position.
Allied coordination: A February 2026 joint statement between Trump’s USTR, the European Union, and Japan over critical minerals supply chain cooperation represents tentative multilateral alignment, but many U.S. allies remain reluctant to cut off trade with China, with Seoul reportedly finding U.S. semiconductor alliance proposals “not fully acceptable” in 2022.
The dual pressures—military commitments in the Middle East and economic competition with China—test whether Washington can sustain strategic focus across domains. For Beijing, the calculation is simpler: wait, diversify supply chains, and let America’s adversaries multiply.