US President Donald Trump is pushing ahead with another round of global tariffs, just a day after being told last year’s levies were illegal.

In a post on social media, Trump confirmed he’ll lift the tariffs to 15 percent, higher than the 10 percent rate he announced yesterday.

The move comes after a Supreme Court ruling found his sweeping trade measures from last year were unlawful.

Former US Under Secretary of Commerce and Security Bill Reinsch says this will make it harder for Trump to threaten and bully other countries with even higher tariffs.

"He won't be able to do that anymore, and I think that's why he's really unhappy. It's also a significant limitation on Presidential power, the real importance of this decision is historic." 

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