U.S. and foreign officials, corporate executives, analysts and investors had begun to hope the tumultuous U.S. trade policy reversals of last year were finished. Now they face rekindled uncertainty from a U.S. Supreme Court ruling last week that struck down key parts of President Donald Trump's tariff plans and his ensuing suggestion of substantial levies coming in an attempted workaround. Reminiscent of the early months of 2025, when the administration's tariff proposals seemed to switch on a moment's notice, the landscape of what goods will be taxed, at which rates, from which exporting countries, is again up in the air. Businesses, many of whom felt they'd found a workable approach to higher tariffs, will now have to decide whether to shift their pricing plans, rush to restock inventories while the tariffs are in limbo, and perhaps whether to delay hiring or investment plans while the situation gets sorted. "If it shakes the whole equilibrium which people in trade have got used to...it is going to bring about disruptions," European Central Bank president Christine Lagarde said Sunday on CBS's "Face the Nation". "You want to know the rules of the road before you get in the car. It's the same with trade. It's the same with investment."