More than $175 billion in collected tariffs could be refunded after the US Supreme Court struck down key duties imposed under President Donald Trump’s aggressive trade push, dealing a major legal and financial setback to a move, once billed as pitched as cornerstone of his economic reset.The 6–3 ruling said Trump overstepped his authority by using emergency-powers law to impose sweeping tariffs, with Chief Justice John Roberts stressing that the statute did not grant presidents open-ended power to set import taxes.