Trump and his advisers have repeatedly insisted that the U.S. president can pretty much do whatever he wants and that the pesky Congress need only be consulted rarely.
Washington has demonstrated beyond any doubt that its rift with Europe is irreversible, by deliberately choosing to go to war against Iran without consulting its European allies.
U.S. companies, importers and retailers will bear the initial costs which most economists expect to filter through the supply chain as a cost-push inflation.