Trade war escalates after negotiations break down with Trump’s aggressive tariff agenda The president has invoked a long dormant section of law to hit one of America’s closest allies, a move that has troubled courts in the past. Key points and original sources are listed below.

• Trade war escalates after negotiations break down with Trump’s aggressive tariff agendaS1

• The president has invoked a long dormant section of law to hit one of America’s closest allies, a move that has troubled courts in the past.S2