In a bold move following a Supreme Court ruling that challenged the legality of his tariff policy, President Donald Trump has announced an increase in tariffs on imports from all nations from 10% to 15%. This decision, which came less than 24 hours after the court’s decision, reflects Trump’s ongoing commitment to an aggressive trade agenda aimed at bolstering American manufacturing, despite warnings of potential economic backlash.
Tariff Increase Following Judicial Ruling
On Saturday, Trump took to Truth Social, declaring the new tariff rate effective immediately. The announcement was made in response to a Supreme Court ruling that deemed his previous tariff implementation, executed under the International Emergency Economic Powers Act (IEEPA), unconstitutional without congressional approval. The President referred to the justices’ decision as a “disgrace to the nation,” expressing his frustration clearly in public statements.
In his post, Trump stated, “I, as President of the United States of America, will be, effective immediately, raising the 10% Worldwide Tariff on Countries, many of which have been ‘ripping’ the U.S. off for decades, without retribution (until I came along!), to the fully allowed, and legally tested, 15% level.” This new measure falls under Section 122 of the Trade Act of 1974, which permits the President to impose tariffs of up to 15% for a temporary period of 150 days, after which congressional approval is required.
Implications for International Trade
The raised tariffs come at a time of heightened global trade tensions. German Chancellor Friedrich Merz has announced plans to visit Washington with a unified European stance in light of Trump’s decision, cautioning that increased tariffs sow uncertainty that could harm both European and American economies. “The biggest poison for the economies of Europe and the U.S. is this constant uncertainty about tariffs. And this uncertainty must end,” Merz remarked.

French President Emmanuel Macron echoed these sentiments, emphasising the importance of upholding the rule of law and expressed concern that unilateral decisions could destabilise trade relations. He indicated that France would be evaluating the impact of Trump’s new tariff strategy, advocating for reciprocity rather than unilateral measures.
The implications of the increased tariffs extend to nations like the United Kingdom, which had previously negotiated a 10% tariff framework with the U.S. William Bain, head of trade policy at the British Chamber of Commerce, warned that the hike would negatively impact trade, US consumers, and businesses while jeopardising global economic growth.
Exemptions and Ongoing Trade Strategies
In Trump’s tariff announcement, certain exemptions were noted, including critical minerals, metals, and pharmaceuticals, as well as USMCA-compliant goods from Canada and Mexico. Meanwhile, the Supreme Court’s recent ruling does not affect separate tariffs that Trump had previously imposed on specific industries, such as steel, aluminium, and automobiles, which remain in effect.
Trump’s administration has collected approximately $130 billion in tariffs under the IEEPA, a significant portion of which has been borne by U.S. businesses and consumers. This has led to growing calls from business associations for refunds, although the President has indicated that any reimbursement would involve a protracted legal battle.
Continued Criticism of the Judiciary
Despite the legal challenges, Trump has not held back in his criticism of the Supreme Court justices who ruled against him. He labelled the 6-3 decision as “ridiculous, poorly written, and extraordinarily anti-American,” while praising the dissenting justices. In a press conference, he expressed disappointment in some of his own appointees, stating, “They’re just being fools and lapdogs for the Rinos [‘Republicans in name only’] and the radical-left Democrats.”

Why it Matters
Trump’s decision to raise tariffs amidst judicial scrutiny signals his administration’s unyielding stance on trade policy, even in the face of legal obstacles. The ripple effects of this move could lead to increased costs for consumers and businesses, heightening tensions in international trade relations. As nations respond and recalibrate their strategies, the stability of global markets hangs in the balance, underscoring the importance of clarity and cooperation in trade negotiations.