• The Trump administration is preparing to shift to alternative legal authorities, such as Sections 301, 122, 232, and 338 of U.S. trade law, to maintain broad tariffs if the Supreme Court invalidates the current IEEPA-based duties.
  • Internal planning is underway at the White House, Commerce Department, and U.S. Trade Representative to rapidly re-impose duties, with National Economic Council Director Kevin Hassett publicly citing Section 301 and Section 122 as backup tools.
  • Analysts estimate that if the Court strikes down the emergency tariffs, the administration might have to refund over $88 billion in collected duties but could eventually replace most of the tariff burden using these alternative authorities.

Efforts to restructure the legal basis for sweeping tariffs have hit a snag as the Supreme Court weighs challenges to President Trump's use of the International Emergency Economic Powers Act (IEEPA) to impose "reciprocal" tariffs tied to trade deficits. According to people familiar with the matter, internal planning is already in motion at the White House, Commerce Department, and U.S. Trade Representative to pivot quickly if the IEEPA-based tariffs are struck down.

National Economic Council Director Kevin Hassett has publicly stated that the administration could rely on Section 301 of the Trade Act of 1974, which targets unfair trade practices, or Section 122, used for balance-of-payments emergencies, as backup tools. Some of this "Plan B" is already underway, including a Section 301 investigation against Brazil and continued 301 tariffs on selected Chinese products. Without a deal to uphold the current legal framework, the administration would be forced into a rapid reconfiguration of its tariff strategy.

Trade and logistics advisers are urging importers to stress-test supply chains and diversify suppliers, reflecting a broader trend of firms treating high, volatile tariffs as a structural feature. The effective average U.S. tariff rate on imports is about 14.4%, with more than half attributable to IEEPA-based duties now at legal risk. Abrupt removal could temporarily lower import costs, but re-imposition under other sections might quickly restore much of the burden and uncertainty.

Internationally, trading partners are watching closely; changes in legal authority will not alter the basic protectionist stance but may affect retaliation strategies and WTO disputes. The situation has fueled public debate over presidential trade powers, with Congress and courts previously allowing broad delegation but now facing a major test of its outer limits. Past episodes, like the 2018–2020 trade conflicts, show that administrations often pivot to alternative tools when specific avenues are blocked.

In the short term, if the Supreme Court rules against IEEPA-based tariffs, there could be a window of lower tariffs and potential duty refunds, followed by rapid attempts to reinstate similar levels of protection. Businesses should expect legal and operational confusion around retroactivity and refund processes. Most economists and trade lawyers cited in coverage expect "most duties to eventually be fully replaced," keeping average tariff levels elevated relative to pre-Trump norms.

Prolonged reliance on creative statutory interpretations, such as Section 338 of the Tariff Act, could trigger new litigation and potential future congressional efforts to rein in presidential tariff authority. Persistent tariff use may accelerate global supply-chain diversification away from the U.S. and entrench a more fragmented, bloc-based trade system. The White House continues to adjust "reciprocal tariff" schedules via additional executive actions while the case is pending, underscoring its commitment to the policy even under legal scrutiny.

Trade advisers and industry groups are publishing 2025 tariff "action plans" to help companies manage exposure, signaling that high, politically driven tariffs are now treated as a baseline business risk. Other countries are exploring their own defensive tariffs and industrial policies, creating parallel protectionist dynamics, though none has yet replicated the exact IEEPA-based approach before the U.S. Supreme Court. Attempts to reach the White House for further comment were unsuccessful as of press time.