Countries that are in step must trade together

Donald Trump and Kamala Harris agree on little except a disdain for free trade. Ahead of the 2024 US presidential election, Mr Trump has threatened a 10% across-the-board tariff on imports, while Ms Harris, whose policy positions remain murky, has indicated that she would follow in President Joe Biden's footsteps with "targeted and strategic tariffs". American politicians' free-trade enthusiasm...