US President Donald Trump has warned he would impose even higher tariffs on countries that “play games” with existing trade deals, after the Supreme Court’s recent decision to block his sweeping levies.
“Any Country that wants to ‘play games’ with the ridiculous supreme court decision, especially those that have ‘Ripped Off’ the U.S.A. for years, and even decades, will be met with a much higher Tariff, and worse, than that which they just recently agreed to,” he wrote on Truth Social. “Buyer beware.”
The court ruled that Trump had overstepped his powers in enacting a sweeping global programme of tariffs.
After the ruling, the president announced first a 10% and, later, 15% global tariff.
The new rate will become effective from Tuesday.
Tariffs are taxes on imported goods. The tax is paid to the government by the companies that bring in the foreign products.
The top court’s ruling only applied to Trump’s invocation of the 1977 International Emergency Economic Powers Act (IEEPA), which accounted for the bulk of the tariffs that he has imposed during his second term in the White House.
Meanwhile, a complex patchwork system of more specific tariffs – which target American imports of certain goods, or imports from certain countries – remains in place. Some other products are exempt.
The Trump administration is also examining other legal mechanisms by which it could raise further tariffs – a fact that was highlighted by US Trade Representative Jamieson Greer on ABC News on Sunday.
“We found ways to really reconstruct what we’re doing,” Greer explained. “Now, it doesn’t have the same flexibility that the president had under the previous authority that he was using, but he gives us very durable tools.”
Greer said this plan would be “roughly equivalent to the types of tariffs that we have in place under IEEPA”.
The legislation now used by Trump can only apply for 150 days, after which Congress must be consulted for an extension.
But in a separate Truth Social post on Monday, Trump said he did not believe he needed congressional approval.
“It has already been gotten, in many forms, a long time ago,” he wrote. “They were also just reaffirmed by the ridiculous and poorly crafted supreme court decision.”
Senate Democratic Leader Chuck Schumer warned on Monday that Democrats would block any attempt to extend the 150-day tariffs.
“Senate Democrats will continue to fight back against Trump’s tariff tax, and will block any attempt to extend these harmful tariffs when they expire this summer, ” Schumer said in a statement. “Democrats will not go along with furthering Trump’s economic carnage.”
The US president has long argued that tariffs will boost domestic manufacturing and create jobs, and has also used them to pursue a variety of other political ends.
He has also sought to justify his policy as a matter of national security. He has said there is an “extraordinary and unusual threat” posed to the US by its trade deficit – a phenomenon under which the US imports more goods than it exports.
But critics have warned that tariffs result in higher prices for consumers and damage to the global economy.
Analysis published earlier this month by the Federal Reserve Bank of New York found that 90% of the cost of increased tariffs that Trump imposed on goods from Mexico, China, Canada and the European Union (EU), was paid for by US companies.
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Supreme Court’s ruling has caused uncertainty in the various countries that negotiated individual deals with the US after the IEEPA tariffs were announced last April.
On Friday, the White House said these countries would face the new blanket global tariff rate – which was then 10%, before being raised by Trump to 15% the next day.
The Trump administration expects those countries to keep abiding by the concessions they had agreed under the trade deals, the official added.
“We’re going to stand by them. We expect our partners to stand by them,” Greer said of the deals in a separate interview on Sunday, with CBS News.
Among the countries affected are the UK – which had negotiated a tariff rate of 10% on most goods, but now appears to face a 15% rate in the wake of the Supreme Court ruling.
The UK government has said it expects Britain’s “privileged trading position with the US” to continue.
Individual businesses around the world have repeatedly complained about the uncertainty caused by an ever-changing tariffs regime.
Fraser Smeaton, the co-founder of a UK costumes company which exports around 60% of its products to the US, told the BBC it had been a rollercoaster year, capped by more turmoil since the court ruling.
On the day that Trump announced the IEEPA tariffs last April, the tariffs on his products went from zero to 30%, Smeaton told BBC Radio 4’s Today programme. Afterwards, they went up to 100%, then 145%, and eventually a rate of 30% was paid. This later changed to 20% and, for a few hours on Friday after the ruling, it was zero again, then up to 10%, and on Saturday, 15%.
“We’ve had an awful lot of upheaval and uncertainty that we’ve had to deal with.”
Watch: BBC inside Trump press briefing slamming Supreme Court tariffs ruling
For his part, Trump branded Friday’s Supreme Court ruling “ridiculous, poorly written, and extraordinarily anti-American”.
Another question that hangs over the issue is whether or not consumers and businesses will be able to claim refunds for the estimated $130bn (£96bn) that they have paid as a result of Trump’s IEEPA tariffs.
Trump himself has previously warned of the potential complexities around the issue.
While the Supreme Court’s ruling determined that these particular tariffs were not legal, it did not offer guidance on returning any money.
Another key Trump official, Treasury Secretary Scott Bessent, highlighted that fact in an interview of his own with CBS on Sunday. He said he expected the issue to be heard by a lower court.
Bessent echoed Greer in saying that the Trump administration would successfully navigate the Supreme Court ruling, saying: “Tariff revenue will be unchanged this year and will be unchanged in the future.
BBC