With President Trump’s announcement of sweeping tariffs on 2 April, he appears to be waging an economic war against the rest of the world. This column turns to non-cooperative game theory to attempt to understand what Trump thinks the US will gain from this war. Although including Europe’s military security vulnerabilities may give Trump the upper hand in his ‘game’, it is likely that in the end there will only be losers. President Trump is once again waging a ruthless economic battle against