U.S. President Donald Trump has warned that countries delaying trade agreements with the United States could face higher tariffs, following a Supreme Court ruling that suspended his administration’s global duties. The court ruled that the 1977 International Emergency Economic Powers Act does not authorize the president to impose import taxes. In response, Trump announced new global tariffs of 10 percent, later raised to 15 percent, set to take effect Tuesday under a different legal provision allowing temporary tariffs for 150 days without congressional approval.

The European Union said it would delay ratifying a summer trade deal, while India postponed scheduled talks. The United Kingdom sought clarification on whether its agreement would remain exempt from the new 15 percent tariff. British Trade Secretary Peter Kyle acknowledged the uncertainty, and European Parliament trade chair Bernd Lange said the situation had become more unpredictable. The White House maintained that the ruling did not alter its trade policy, with U.S. Trade Representative Jamison Greer stating that only the legal tools had changed.

The new tariffs are due to expire after 150 days unless extended by Congress. Senate Democratic leader Chuck Schumer warned his party would oppose any effort to increase tariffs. U.S. stock prices fell about 1 percent Monday amid growing market uncertainty.