Washington/IBNS, Feb. 22 -- US President Donald Trump has increased global tariffs from 10 percent to 15 percent, a move announced just a day after the US Supreme Court delivered a major blow to his trade policy.

The decision, revealed on Saturday, comes in the wake of a court ruling that struck down sweeping tariffs imposed by the Trump administration, holding that the president had exceeded his constitutional authority.

Trump announced the tariff hike in a strongly worded post on Truth Social, sharply criticising the Supreme Court's decision.

Describing the ruling as "poorly written" and "anti-American", he said he had ordered an immediate increase in the worldwide tariff rate to 15 percent.

In his statement, Trump argued that sever...