US Supreme Court rejects Donald Trump's global tariffs

The court ruled that the Trump administration's interpretation that the law at issue. File picture: AP Photo/Evan Vucci)

The US Supreme Court struck down on Friday president Donald Trump's sweeping tariffs that he pursued under a law meant for use in national emergencies, rejecting one of his most contentious assertions of his authority in a ruling with major implications for the global economy.

The justices, in a 6-3 ruling authored by conservative Chief Justice John Roberts, upheld a lower court's decision that the Republican president's use of this 1977 law exceeded his authority.