Trump’s Tariff Warning to Countries Exploiting Supreme Court Ruling

President Donald Trump issued a warning on Monday to foreign nations looking to take advantage of recent Supreme Court tariff decisions in order to evade trade agreements. He indicated that those countries could face even harsher tariffs than those initially negotiated under his administration.

On Truth Social, Trump stated, “Countries that want to ‘play the game’ with the ridiculous Supreme Court decision, especially those that have been ‘ripping off’ the United States for years, even decades, will be subject to tariffs that are much higher or even worse than those they just recently agreed to. Buyer beware!” This comes amid the European Union’s pause on ratifying a trade deal with the U.S. and Japanese opposition politicians pushing for a reassessment of Tokyo’s $550 billion investment plan. Both actions cite the uncertainty stemming from Friday’s Supreme Court ruling that declared President Trump’s emergency tariff powers invalid.

The Supreme Court concluded that Trump’s use of the International Emergency Economic Powers Act to impose global tariffs infringes on Congress’s constitutional authority over taxation. In response, Trump announced new tariffs, starting at 10% and later increasing to 15%, under Section 122 of the Trade Act of 1974, which permits the president to impose tariffs for 150 days without needing Congressional approval.

These legal challenges seem to have given U.S. trading partners pause, prompting them to reconsider previously negotiated agreements. On Monday, the European Parliament, which had already halted talks due to Trump’s threats of Greenland tariffs earlier this year, declared it would delay approval of the Turnberry deal intended to eliminate tariffs on U.S. goods.

Chairman of the European Parliament’s trade committee, Bernd Lange, expressed concern, noting, “The situation is more uncertain than ever. This goes against the stability and predictability that we sought to achieve with the Turnberry agreement.”

Despite the EU’s hesitation, administration officials asserted that the agreement remains valid. U.S. Trade Representative Jamison Greer conveyed on CBS’ Face the Nation that the administration expects its partners to adhere to the terms of the agreement. He stated, “That’s why we signed these agreements even though the lawsuits are pending,” adding that, regardless of the outcome, tariffs would be imposed for a year.

Treasury Secretary Scott Bessent remarked that the U.S. is in ongoing communication with its trading partners, who, he noted, are still in favor of the tariff agreement. However, European officials are seeking clarity before proceeding further. The European Commission has emphasized the need to understand the next steps from the Trump administration before making any decisions on their end.

In Japan, the political landscape is divided on how to respond. Conservative publications like Yomiuri Shimbun and Sankei Shimbun advocate for maintaining the $550 billion investment commitment, while liberal outlets like Asahi Shimbun and Mainichi Shimbun are calling for a reassessment of the agreement following the court’s ruling.

The Japanese government has aligned with conservative views. Economy, Trade and Industry Minister Yoshinari Akazawa assured U.S. Commerce Secretary Howard Lutnick that there would be no alterations to the investment deal. In contrast, India has postponed trade discussions that were planned for this week in the U.S.

Trump’s posts on Truth Social suggest his patience with trading partners seeking renegotiations is limited. He later emphasized that “as President, there is no need for me to go back to Congress to approve tariffs.”

The administration has yet to explore the new Section 301 or Section 232 requirements needed for long-term tariffs, leaving the 15% Section 122 tariff as its main instrument for now. These tariffs could be active for a total of 150 days.

Looking ahead, Trump is set to visit China on March 31st for a meeting with President Xi Jinping. Greer noted that the U.S. has already established average tariffs of about 40% on Chinese goods without resorting to the emergency powers that were recently invalidated by the courts.