U.S. President Donald Trump warned that any country attempting to exploit the Supreme Court's recent ruling would face steeper tariffs.
"If any country wants to play with the ridiculous Supreme Court decision, they will be met with higher tariffs," Trump wrote on Truth Social on Friday.
The president specifically targeted nations he accused of exploiting the U.S. for years or decades. "Those that have 'Ripped off' America will face higher tariffs than they recently agreed to, and worse," he added, concluding with "BUYER BEWARE!!!" The warning suggests Trump would hold trading partners responsible if deals collapse.
Trump has repeatedly criticized allies including South Korea for running large trade surpluses with the U.S. Analysts interpret his latest remarks as a warning to South Korea, Japan, and the European Union against using the court ruling to renegotiate trade agreements.
The EU has shown signs of halting parliamentary approval of its current trade deal with Washington. Brussels argues that reciprocal tariffs underpinning the agreement have been invalidated and that the U.S. imposed new tariffs under Section 122 of the Trade Act—a provision not included in the original deal.
On May 20, the Supreme Court ruled that reciprocal and fentanyl-related tariffs imposed under the International Emergency Economic Powers Act of 1977 were unlawful. Trump immediately pivoted to Section 122, announcing 15% tariffs on all global imports for 150 days, effective 12:01 a.m. Eastern Time on May 24.
The administration is also reviewing additional measures under Section 301 of the Trade Act and Section 232 of the Trade Expansion Act to target countries engaged in unfair or discriminatory trade practices, as well as specific products deemed threats to national security.