The Trump administration has responded by threatening even more levies on foreign goods entering the US. But the fight between Washington and a growing list of countries is not just about trade. At last month's G7 summit in Canada, Trump was at odds with most of his country's closest allies. Many of the same tensions seem likely to cloud next week's NATO summit in Brussels.
In all these debates, President Trump talks about "winning" and what he calls "better deals." But it often seems like his real target is the web of international institutions and alliances that have evolved in the decades since the end of the Second World War - often at the behest of America itself.
So, can the global system of rules-based institutions survive Trump's efforts to undermine them?
Presenter: Adrian Finighan | Guests: Scott Lucas - Professor of International Politics, University of Birmingham (UK); Philippe Legrain - Former Economic Adviser to the president of the European Commission; Pauline Loong - Managing Director, Asia-Analytica