Law Professor's Take on the SCOTUS Decision on Tariffs Will Likely Not Please the Libs

 


The Supreme Court’s 6–3 ruling is definitely a setback for the administration, but it’s not the end of the road. What the Court said, in plain terms, is that the president can’t rely on the International Emergency Economic Powers Act to impose tariffs the way this administration did. The majority agreed with the argument that tariffs operate like taxes, and since the Constitution gives Congress the authority to levy taxes, that power can’t just be stretched through emergency statutes.


It’s worth noting that the lineup was unusual. Chief Justice Roberts, along with Justices Gorsuch and Barrett, joined the three liberal justices. Meanwhile, Justices Thomas, Alito, and Kavanaugh dissented. That alone shows this wasn’t a simple partisan split but a real debate about constitutional boundaries.


Critics of the tariffs argue that using IEEPA was an end-run around Congress. They believe that if tariffs function as taxes, then lawmakers not the executive branch must authorize them. The Court clearly found that reasoning persuasive.


That said, as Professor Jonathan Turley pointed out, the administration still has other legal pathways available. Trade law is complex, and Congress has already delegated certain tariff authorities to the executive branch under different statutes. So while this ruling closes one door, it doesn’t lock the whole building. There are established mechanisms—like Section 232 or Section 301 authorities—that have been used by multiple administrations in the past.


From the administration’s perspective, the concern is leverage. Treasury Secretary Scott Bessent warned that limiting the president’s flexibility could weaken America’s hand in trade negotiations and national security disputes. President Trump has consistently framed tariffs not just as economic policy but as a defensive tool—something meant to protect American industries and reduce reliance on foreign supply chains, especially in strategic sectors.


The political fallout is also real. Some Republicans have pushed back, including efforts in the House to challenge tariff authority. A handful even joined Democrats on a resolution criticizing tariffs on Canada. At the same time, President Trump made it clear he expects party unity on trade and warned of primary challenges for Republicans who oppose his tariff strategy.


So yes, this decision stings for those who see tariffs as central to reshaping U.S. trade policy. But legally and politically, the debate is far from settled. Congress still has the option to step in more directly, and the executive branch retains other tools. What this ruling really does is force a clearer constitutional conversation about where trade authority begins and ends—and that conversation is likely just getting started.

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