US President Donald Trump’s tariff programme has been a central pillar of his second term in office. But a case being heard by the US Supreme Court could throw this central tenet of his trade policy into disarray. Trump has argued that tariffs are a matter of national security for which the president is ultimately responsible; others say they’re an economic issue, and should be set by Congress, as set out in the US constitution. Which way will the Supreme Court vote – and what could that mean for Trump’s tariff regime? To find out, FT senior trade writer Alan Beattie speaks to Jennifer Hillman, a law professor at Georgetown University, former general counsel of the US trade representative, and one of the few people who predicted Trump’s tariffs were vulnerable to legal challenge.

Alan Beattie is the FT’s senior trade writer. You can find his articles here: https://www.ft.com/alan-beattie

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Presented by Alan Beattie. Produced by Mischa Frankl-Duval. Flo Phillips is the executive producer. Manuela Saragosa is the FT’s acting co-head of audio. Original music and sound design by Breen Turner.

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