Canadian Prime Minister Mark Carney has called on citizens to support domestic industries amid escalating trade tensions with the United States. The appeal follows US President Donald Trump’s threat to impose 100% tariffs if Canada deepens economic ties with China. Canadian Prime Minister Mark Carney has called on citizens to support domestic industries amid escalating trade tensions with the United States. The appeal follows US President Donald Trump’s threat to impose 100% tariffs if Canada deepens economic ties with China.