US President Donald Trump on Tuesday declared a sweeping national emergency aimed at reversing what he described as decades of economic sabotage through unfair trade practices. The executive order, issued under the rarely used International Emergency Economic Powers Act of 1977, will impose a 10% tariff on all imports into the United States, with higher duties to follow on goods from countries with which the US runs the largest trade deficits.The move, which takes effect April 5, marks one of the most aggressive interventions in global commerce by any US president in modern times. Trump said the decision was necessary to defend national security, rebuild domestic manufacturing, and reclaim the country’s “economic sovereignty.”