Pakistan, Feb. 21 -- US President Donald Trump announced raising worldwide tariffs on imports from 10% to 15%, effective immediately. The move follows a Supreme Court ruling limiting his unilateral authority on trade duties. Trump called the decision "extraordinarily anti-American" and vowed to continue a global trade stance.

Trump said the hike to 15% is "fully allowed and legally tested," responding to Friday's court decision. He had earlier imposed a 10% tariff on imports from all countries, adding to existing levies. The announcement underscores continued uncertainty in global trade markets.

The law permits tariffs up to 15% for 150 days, though legal challenges are expected. Trump criticized justices and reaffirmed his intention to...