The Trump administration says it plans to impose a 15% global tariff later this week after the U-S Supreme Court struck down much of the president's Liberation Day tariffs.

In a split 6-3 decision, the Court ruled Donald Trump lacked the power as President to unilaterally set tariffs on imports, and had therefore illegally imposed them under a law meant for national emergencies.

The US President has now vowed to use other measures to continue his tariff program.

Australian businesses are believed to have paid more than one-point-four billion dollars on goods shipped to the US since April 2025 ... now there are calls for the tariffs to be refunded. 

• GUEST: Professor Kathleen Claussen, Georgetown University in Washington and a former Associate General Counsel at the Office of the US Trade Representative