Last year it was China’s answer to tariffs, now it’s Iran’s retaliation to airstrikes – ‘America First’ keeps foundering on global economics Last year it was China’s answer to tariffs, now it’s Iran’s retaliation to airstrikes – ‘America First’ keeps foundering on global economics D onald Trump is teaching the world a lesson, but not the one he thinks. The attack on Iran was meant to be a dazzling display of military supremacy. It has instead illuminated chinks in the US’s armour. The US