Trump Trade Deals Illegal: Supreme Court Warning by 2026
Billions and Bilateral Deals at Stake as Trump’s Tariffs Face Supreme Court Scrutiny
The future of billions of dollars in trade and numerous bilateral deals hangs in the balance as the Supreme Court prepares to rule on President Trump’s use of the International Emergency Economic Powers Act (IEEPA) to impose tariffs. A decision against Trump could instantly invalidate all trade deals and announced tariff changes made under IEEPA, potentially triggering a wave of refunds for companies and individuals who have paid what could be deemed unlawfully imposed tariffs.
Will Tariffs Go Away Soon?
Despite the legal challenges, analysts at Piper Sandler predict that tariffs are likely to remain in place for the foreseeable future, citing administrative stays and the protracted nature of the judicial process. Even if reciprocal tariffs are struck down, Trump could potentially leverage other statutes, such as Section 232, which covers steel, aluminum, and automobiles. While Section 232 has stricter legal guardrails, Piper Sandler notes that Trump has a history of stretching the authority of trade statutes.
“The base case is there will be years of legal battles over tariffs,” the Piper Sandler team stated in a research note.
The note highlights at least eight ongoing lawsuits filed by a diverse range of plaintiffs,including states,tribes,and small businesses,all challenging Trump’s application of IEEPA. These cases are spread across multiple federal circuits, indicating that protracted legal disputes are probable, regardless of the Supreme Court’s eventual ruling.
Piper Sandler emphasizes that major multinational corporations and foreign governments perceive U.S. trade policy as inherently unstable. This uncertainty, they argue, is fostering a reluctance to commit important investments in the U.S. until the legal landscape becomes clearer. This situation is expected to persist for months, if not years, irrespective of any immediate court decision.
Legal Uncertainty and Investment Hesitation
The $550 billion Japanese investment pledge, cited by Piper Sandler as an example of economic promises lacking clarity, specifics, or legal durability, underscores the broader concerns. “Our trading partners and major multinationals know Trump’s tariffs are on shaky ground,” the Piper team wrote. “It’s notable the promise of $550 billion in Japanese investments in the U.S. is accompanied by no details. It’s not clear where the money will be coming from, who will decide how it is allocated, and over what period the $550 billion will be spent.”
Piper Sandler analysts express confidence that the Supreme Court will likely echo recent judicial skepticism towards the executive branch’s broad interpretations of statutory authority. They anticipate that conservative justices will vote similarly to how they have in recent cases, where they “lined uniformly against the Executive Branch pulling out an old statute and asserting far-reaching, never-before-used authority nowhere found in the text of the statute.” Similarly, liberal justices are not expected to grant unlimited authority to the President.
However, given President Trump’s propensity for litigation and the existing legal calendar, Piper Sandler concludes, “Instability surrounding trade is likely to last a lot longer.”
