President Donald Trump said Saturday that he will raise his new global tariff to 15%, up from 10%, just one day after the Supreme Court of the United States ruled that he overstepped his authority in imposing earlier trade penalties.
In a post on Truth Social, Trump said the higher rate would take effect “immediately” and described it as the “fully allowed” level under Section 122 of US trade law. That provision lets presidents impose temporary tariffs of up to 15% for 150 days without congressional approval.
On Friday, the court voted 6–3 to strike down Trump’s previous tariffs, which he had issued under the International Emergency Economic Powers Act. The justices found that he exceeded the limits of that law. Trump criticized the ruling and said he would pivot to other legal tools to keep pressure on trading partners.
The White House has not clarified when the 15% tariff will formally take effect, though earlier guidance pointed to Tuesday.
Economists say the change reshuffles the landscape. Some countries that previously faced tariffs as high as 50% could see lower rates under the new structure. Others that paid less may now face steeper costs.
Retailers and automakers could benefit if certain duties ease, but analysts caution that consumers may not see immediate price relief. Businesses still face uncertainty as the administration considers additional tariffs under other trade statutes.
For now, global markets must adjust again as trade policy shifts in real time.
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