U.S. stock-index futures dipped on Sunday, as it appeared the U.S. was on the verge of an all-out trade war with Canada, one of its biggest trade partners.

PM Mark Carney says ‘we got attacked’ as tariffs come into force on items from hockey sticks to tongue depressorsDonald Trump has hit back at Canada after a breakdown in negotiations plunged the two c

Collapse of talks threatens to raise prices even higher months before midterm election