Within hours of the Supreme Court affirming the president’s sweeping authority to impose tariffs under a centuries-old trade law, President Donald Trump moved aggressively to reshape the American trade order, announcing a new round of tariffs that sent shockwaves through global markets and reignited fierce debate over the constitutional limits of executive power.
The sequence of events on Thursday was striking in its speed and scope. The Supreme Court, in a landmark ruling, upheld Trump’s use of the International Emergency Economic Powers Act (IEEPA) to impose tariffs, rejecting challenges that argued the president had overstepped his constitutional authority. Within hours, Trump took to Truth Social to announce a 50 percent tariff on imports from the European Union, set to take effect on June 1, and a 25 percent tariff on Apple iPhones manufactured outside the United States. The announcements rattled investors and drew immediate condemnation from trading partners, as reported by Wired.
The Supreme Court Ruling That Changed Everything
The court’s 6-3 decision, split along ideological lines, represented one of the most consequential rulings on executive trade authority in modern history. Chief Justice John Roberts, writing for the majority, held that IEEPA grants the president broad discretion to regulate international economic transactions during declared national emergencies, and that tariffs fall within the scope of that authority. The ruling effectively closed the door on the most promising legal avenue that opponents of Trump’s tariff regime had pursued since early 2025.
The three liberal justices dissented sharply. Justice Ketanji Brown Jackson, in a dissent joined by Justices Sonia Sotomayor and Elena Kagan, warned that the majority’s reading of IEEPA “transforms a statute designed for targeted financial sanctions into an unlimited license to tax imports.” Jackson argued that the Constitution’s grant of tariff authority to Congress in Article I was being effectively nullified by the ruling. Legal scholars on both sides of the debate acknowledged the ruling’s enormous implications. “This is a fundamental reordering of who controls trade policy in the United States,” said Ilya Somin, a law professor at George Mason University, in comments reported by multiple outlets.
Apple in the Crosshairs: A 25 Percent iPhone Tariff
Perhaps the most attention-grabbing element of Trump’s post-ruling offensive was his announcement of a 25 percent tariff on iPhones and other Apple products not manufactured in the United States. The move appeared to be a direct escalation of Trump’s long-running campaign to pressure Apple into shifting production from China and other Asian manufacturing hubs to American soil. Apple’s stock dropped sharply in after-hours trading following the announcement, dragging down the broader technology sector.
Apple has invested billions in its supply chain across China, India, and Vietnam, and industry analysts have long warned that onshoring iPhone production would be extraordinarily expensive and logistically complex. According to Wired, Trump posted on Truth Social that Apple had “plenty of time and money” to build manufacturing capacity domestically, adding that the tariff was necessary to protect American workers. Apple declined to comment publicly on the announcement, though sources familiar with the company’s thinking told reporters the move was being studied carefully by executives in Cupertino.
The European Union Faces a 50 Percent Wall
The 50 percent tariff on EU imports, set to begin June 1, represented a dramatic escalation from the already elevated tariff levels that had been in place since April. Trump had previously imposed a baseline 20 percent tariff on EU goods as part of his “Liberation Day” tariff package, before partially pausing some of the higher reciprocal rates during a 90-day negotiation window. That window had been the subject of intense transatlantic diplomacy, with European Commission President Ursula von der Leyen and other senior EU officials shuttling to Washington in an effort to reach a deal.
Those negotiations had evidently stalled. Trump blamed the EU for failing to offer meaningful concessions on agricultural market access, regulatory barriers, and the bloc’s persistent trade surplus with the United States, which exceeded $230 billion in 2024. European officials reacted with alarm. French President Emmanuel Macron called the tariff “an act of economic aggression” and urged a unified European response. Germany’s economy minister warned that retaliatory measures were being prepared. The euro fell against the dollar in overnight trading as markets priced in the potential for a full-blown transatlantic trade war.
Markets Reel as Uncertainty Deepens
The dual tariff announcements sent U.S. stock futures tumbling late Thursday. The S&P 500 futures dropped more than 2 percent, while the Nasdaq, heavily weighted toward technology companies, fell even further on the Apple-specific threat. Bond yields declined as investors sought safety, and gold prices surged to new highs. The market reaction underscored the degree to which investors had been banking on the Supreme Court striking down or limiting the president’s tariff authority—a bet that proved spectacularly wrong.
Wall Street analysts scrambled to reassess their outlooks. Goldman Sachs issued an overnight note warning that the new tariffs, if sustained, could shave a full percentage point off U.S. GDP growth in 2025 and push inflation back above 4 percent. JPMorgan’s chief economist raised the firm’s recession probability estimate to 45 percent, up from 35 percent earlier in the week. Consumer-facing companies, from retailers to automakers, faced the prospect of sharply higher input costs with limited ability to pass them through to already-stretched American households.
Constitutional Questions Linger Despite the Ruling
While the Supreme Court ruling settled the immediate legal question of whether IEEPA could be used to impose tariffs, constitutional scholars warned that the decision opened up a host of secondary legal and political battles. Several members of Congress, including some Republicans, expressed unease with the breadth of the authority the court had affirmed. Senator Rand Paul of Kentucky, a longtime critic of executive overreach, said the ruling “makes Congress irrelevant on trade” and called for legislative action to reclaim tariff authority.
Legislation to that effect has been introduced multiple times since Trump’s first term but has never gained sufficient traction. The political dynamics are complicated: many Republican lawmakers support Trump’s tariffs in principle, even as they worry about the precedent of ceding so much power to the executive branch. Democrats, meanwhile, are divided between those who support protectionist trade measures and those who view Trump’s approach as chaotic and economically destructive. The ruling may ultimately force a broader reckoning in Congress over the delegation of trade authority—a question that has simmered since the Smoot-Hawley era of the 1930s.
The Broader Trade War Enters a New Phase
Thursday’s developments marked a clear inflection point in the global trade conflict that has defined the first half of 2025. Since taking office in January, Trump has imposed tariffs on goods from virtually every major trading partner, including a 145 percent effective rate on many Chinese imports, 25 percent tariffs on Canadian and Mexican goods, and the baseline 10 percent tariff on nearly all other countries. The Supreme Court ruling removed the last significant institutional check on this campaign, leaving only Congress—and the ballot box—as potential constraints.
China, which has been engaged in tit-for-tat tariff escalation with Washington since February, responded cautiously to the latest developments. A spokesperson for China’s Ministry of Commerce said Beijing was “monitoring the situation closely” and reserved the right to take “necessary countermeasures.” Analysts noted that the Apple tariff, in particular, could complicate U.S.-China relations at a moment when both sides had been exploring back-channel talks on a potential trade framework.
What Comes Next for American Consumers and Businesses
For American consumers, the practical effects of the new tariffs could be felt within weeks. The 25 percent levy on iPhones, if implemented as described, would likely add $200 to $400 to the retail price of a new iPhone, depending on the model, according to estimates from analysts at Wedbush Securities. The 50 percent EU tariff would hit a wide range of consumer goods, from European automobiles and wine to machinery and pharmaceuticals, raising costs across the economy.
Business groups reacted with frustration. The U.S. Chamber of Commerce called the new tariffs “deeply counterproductive” and urged the administration to return to the negotiating table. The National Retail Federation warned that the cumulative tariff burden was now at its highest level since the 1930s and that American families would bear the cost. For the technology industry, the Apple-specific tariff raised the specter of a broader campaign targeting individual companies—a prospect that sent a chill through Silicon Valley boardrooms.
The coming days will test whether Trump’s latest moves are opening gambits designed to extract concessions or permanent features of a new American trade policy. With the Supreme Court now firmly behind the president’s authority, the stakes for every negotiation—and every escalation—have risen dramatically.