The Trade Weapon Has a Grammar Now

In five months, the United States has cycled through three legal bases for its tariff regime. The Supreme Court struck down the first, grounded in the International Emergency Economic Powers Act, in February. The Court of International Trade struck down the second, under Section 122 of the Trade Act of 1974, in May. The administration is now deploying Section 301 "forced labor" tariffs covering 60 economies ^[1][2]. USTR Jamieson Greer made the pattern explicit.

The president's trade policy hasn't changed, our tools may change, and we're conducting these investigations. — Jamieson Greer

The quote is a skeleton key. The tariff is the constant; the legal rationale is the swappable variable. And the function of the tariff, as Greer separately explained, is not to remediate the harm the legal vehicle names.

the levies are “critical” to keeping trade partners engaged in negotiations. — Jamieson Greer

That is a description of leverage, not trade remedy. The administration's own words confirm it across multiple instruments and targets. When Brazil refused to negotiate over a bundle of U.S. grievances, Secretary of State Marco Rubio personalized the penalty.

For the past year, Lula has put his own ego ahead of making a deal for the welfare of the Brazilian people, and these tariffs are the price for that. — Marco Rubio

The White House spokesperson put the framing more broadly.

By leveraging our economy – the biggest and best consumer market in the world – and his great relationship with President Xi, President Trump has empowered America to finally operate from a position of strength in global diplomatic and trade matters. — Kush Desai

The conflation is the point. Trade policy and diplomacy are a single coercive instrument. The Brazil case is instructive because of what the tariff vehicle bundled. The Section 301 investigation folded digital trade barriers, illegal deforestation, ethanol market access, and Brazil's domestic Pix instant-payment platform into one "trade practices" case ^[3][4]. Pix is a domestic financial infrastructure project with no trade dimension. Its inclusion signals that the tariff is a catch-all for extracting concessions across domains that are not trade issues. Brazil's government noted that the U.S. runs a trade surplus with Brazil and that the country maintains a low effective tariff rate on American goods ^[3].

the tariffs lacked both economic and legal justification. — Federal government of Brazil

The pharmaceutical tariffs imposed in April share the same structure. The 100% rate is not a fixed penalty. Companies can reduce it to 20% by committing to build U.S. plants, or to 0% through pricing agreements with the Department of Health and Human Services ^[5]. The tariff functions as a penalty for non-compliance and a reward for concessions. The Section 232 "national security" framing is the legal vehicle. The structure is the policy. The swappable-vehicle pattern extends beyond tariffs themselves. Trump threatened 100% tariffs on European countries maintaining digital services taxes on American tech companies, declaring the tariff would override existing trade agreements ^[2]. He suggested delaying a Beijing summit to pressure China into assisting with a U.S. naval mission to reopen the Strait of Hormuz ^[6]. The administration launched Section 301 probes into 16 trading partners, including Switzerland, which had already agreed in November to lower U.S. tariffs on Swiss goods from 39% to 15%. Swiss industry group Swissmem called the probes politically motivated attacks and denied Switzerland pursues overcapacity policies ^[7]. The investigations appear designed to extract further concessions from partners who already capitulated. The administration labeled AI semiconductor sales to China a national security threat and then approved them shortly after, and briefly blacklisted Chinese tech companies before withdrawing the list: the national security framing functions as a reversible lever, not a fixed conviction ^[8]. Greer then rejected the WTO outright after failed digital trade reforms, writing that he arrived a skeptic and left even more convinced of the institution's irrelevance ^[9]. Trump called CUSMA the largest and fairest trade agreement ever achieved and then dismissed it as irrelevant, threatening to exit the pact ^[10]. The trade agreement itself became conditional leverage. Some stated goals are genuine. The pharmaceutical tariff threat did produce real outcomes: 17 companies representing 80% of the branded drug market agreed to sell at what Commerce Secretary Howard Lutnick called the lowest prices anywhere in the world, with the deals tied to $448 billion in returning drug manufacturing ^[11]. Trump claims tariffs reduced the trade deficit by 55%, which he called the biggest drop in history ^[12]. But the presence of real outcomes in some cases makes the swappable ones more revealing, not less. A tool that sometimes delivers its stated purpose and sometimes extracts unrelated concessions is a tool whose purpose is decided case by case. The pattern is not uniquely American. In late June, China imposed export controls on 40 Japanese entities, including Mitsubishi Heavy Industries, Fujitsu, and Komatsu. The controls were triggered by Prime Minister Takaichi's suggestion that Japan could intervene if China used force against Taiwan.

They are aimed at firmly deterring Japan’s reckless pursuit of ‘new militarism.’ — Ministry of Commerce

China insisted the controls leave normal commerce untouched ^[13].

They do not affect normal Sino-Japanese economic and trade exchanges, and honest and law-abiding Japanese entities have absolutely nothing to worry about. — Ministry of Commerce

The disclaimer is identical in function to the one the U.S. attaches to its own trade weapons: the restriction is targeted, the grievance is diplomatic or military, and normal trade is supposedly unaffected. China had already blocked rare earth shipments — terbium, dysprosium, yttrium oxide — to Japan over the same Taiwan defense comments ^[14]. It banned dual-use exports to seven European defense firms, including Hensoldt and FN Herstal, citing arms sales to Taiwan, while again asserting normal economic and trade exchanges are unaffected ^[15]. The grammar is the same: a trade instrument deployed for a non-trade grievance, wrapped in a disclaimer that insists the trade relationship is unchanged. The grammar is spreading to regional actors. In April, Ecuador imposed 100% tariffs on Colombia citing Colombia's failure to curb drug trafficking and organized crime ^[16]. The grievance was security, not trade. Colombia retaliated with matching tariffs, recalled its ambassador, suspended energy sales, and sought Mercosur membership, threatening the 57-year-old Andean Community pact. The EU is preparing its own trade crackdown on subsidized Chinese imports alongside a European Technological Sovereignty Package to reduce dependencies in AI, cloud, and semiconductors, while China threatens resolute countermeasures ^[17]. Market access is now a strategic lever on both sides of that relationship. The consequence is not a dramatic break with the multilateral system. It is a quiet hollowing out by hedging. The EU-Mexico modernized trade deal was explicitly framed as a response to U.S. tariff policy. European Council President António Costa called it a geopolitical statement ^[18].

This agreement is a true geopolitical statement. — António Costa

New Zealand's Trade Minister Todd McClay tied India-NZ trade cooperation directly to global uncertainty ^[19].

Air India and Air New Zealand have just asked for permission in New Zealand from our commerce regulator to be able to cooperate for flights. So, as the rest of the world creates some uncertainty, the free trade agreement allows India and New Zealand to cooperate even more to build reliance upon each other — Todd McClay

China is pursuing approximately 20 trade deals — tariff reductions with Canada on EVs, zero tariffs on 53 African countries, CPTPP membership — explicitly to insulate its economy from U.S. pressure ^[20]. Canada, facing a U.S. administration that threatens to exit CUSMA, struck a deal trading canola tariff reductions for Chinese EV market access ^[10]. India stalled a trade-pact negotiation with the U.S. due to fears of similar punitive levies after seeing the Brazil tariffs ^[3]. None of these countries is repudiating the rules-based system in a single dramatic gesture. They are building parallel architectures because the rules no longer constrain the actors who taught them this grammar. The multilateral system is not being torn down. It is being walked away from, one bilateral deal at a time, by countries that have learned that a trade instrument can be anything its wielder wants it to be.