Trump Tariffs and US Legal Impact: What Businesses Need to Know in 2026
The trade war that defined Donald Trump's second term hit a major legal wall in February 2026. The United States Supreme Court ruled that the President exceeded his authority — and the legal fallout is still unfolding.
Here is what you need to understand about the legal side of Trump's tariff agenda.
The Legal Framework Behind Trump's Tariffs
Trump used the International Emergency Economic Powers Act (IEEPA) as his primary legal tool to impose sweeping import taxes. IEEPA is a 1970s-era emergency law that allows a president to "regulate importation" during national emergencies.
The administration argued that trade deficits and the fentanyl crisis qualified as national emergencies. One set of tariffs, known as the "trafficking tariffs," targeted products from China, Canada, and Mexico, while another set imposed an initial 10% tariff on imports from almost all countries, with even higher rates on dozens of nations.
The Supreme Court Steps In
On February 20, 2026, the Court ruled 6-3 in Learning Resources Inc. v. Trump that IEEPA does not authorize the President to impose tariffs.
Chief Justice John Roberts wrote that the two words "regulate" and "importation" in IEEPA — separated by 16 others — cannot bear the weight of an unlimited presidential power to tax imports. He noted that IEEPA "contains no reference to tariffs or duties" and that no President before Trump had ever read the law this way.
The vote was notable. Justices Amy Coney Barrett and Neil Gorsuch, both Trump appointees, joined Roberts and the three liberal justices in the majority. Justices Thomas, Alito, and Kavanaugh dissented.
What Happens to the Money Already Collected?
This is where it gets complicated for businesses. The ruling means more than $160 billion in tariffs were illegally collected under IEEPA, and the case was returned to the US Court of International Trade to address the issue of refunds.
Even though the legal authority for refunds is clear, the sheer number of refunds that will need to be issued means delays are likely, and US Customs and Border Protection may need to issue public guidance on the refund procedure.
Trump's Next Move — A New Legal Authority
The President did not stop. Within hours of the ruling, Trump turned to Section 122 of the Trade Act of 1974, which allows temporary across-the-board tariffs when the United States has "large and serious balance-of-payments deficits," announcing 10% global tariffs — later raised to 15%. These expire after 150 days unless extended by Congress.
The legal battles are already resuming. The US Court of International Trade gave the federal government less than a month to respond to two lawsuits challenging Trump's global tariff under Section 122, ordering the government to respond to both cases by April 3.
What Businesses Can Do Legally
If your business imported goods under IEEPA tariffs, you may be entitled to a refund. Steps to consider right now:
First, consult a licensed customs attorney to review your import records from April 2025 through February 2026. Second, file a protest with US Customs and Border Protection to preserve your refund claim. Third, monitor the Court of International Trade for procedural guidance on the refund process.
For businesses still operating under the new Section 122 tariffs, legal options are more limited since those tariffs have a valid statutory basis — for now. However, ongoing court challenges mean the legal landscape could shift again before July 2026.
The Bigger Legal Picture
The February 2026 Supreme Court ruling is seen as a major victory for congressional authority over taxation, but experts note the Roberts Court's willingness to check executive power remains to be tested in areas where Trump's policies have wider political support.
For American businesses, the bottom line is clear: tariff policy remains in flux, legal challenges are active, and consulting a trade attorney is no longer optional — it is essential.
This article is for informational purposes only and does not constitute legal advice. For guidance specific to your situation, consult a licensed attorney.
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