Mark Carney says Canada is now 'at war' with US over trade (Ilya Gridneff/Financial Times)

Ilya Gridneff / Financial Times : Mark Carney says Canada is now 'at war' with US over trade - Prime Minister says Donald Trump miscalculated by escalating his tariffs attack on the country - Canada was "at war" over trade with the US after President Donald Trump "miscalculated" by escalating his tariff attack, Prime Minister Mark Carney said.