The US Supreme Court ruled against the tariffs that President Donald Trump imposed, indicating that he exceeded his authority under the International Emergency Economic Powers Act (IEEPA). The court's decision was made with a six to three majority, with Chief Justice John Roberts stating that Trump's interpretation of the IEEPA infringes on congressional powers. This ruling emphasizes the need for clear congressional approval for actions of significant economic and political importance.

In the ruling, the Supreme Court affirmed a lower court's decision that Trump had overstepped his boundaries by using the IEEPA to impose tariffs. The court highlighted the importance of the doctrine of 'major questions,' which requires the executive branch to have explicit congressional authorization for major economic actions. As a result, the court concluded that the president cannot justify extraordinary measures like tariffs without clear legislative backing.

Following the ruling, Trump announced additional 10 percent global tariffs to be imposed over the next 150 days. The announcement of these tariffs, coming after the Supreme Court's decision, raises questions about the balance of power between the presidency and Congress, particularly concerning economic policy. The implications of this ruling may shift how future administrations approach tariff imposition and the scope of emergency powers available to them.