US stock futures fell after 50% tariffs on $20 billion in Canadian goods took effect, with Canada planning retaliatory tariffs by September 8,

Canadian Prime Minister Mark Carney vows to retaliate, says his country recognized that 'America has changed' and that the two countries would 'not return to our old relationship'

US Trade Representative Jamieson Greer said Canada had declined to finalize a trade deal, minutes before fresh Trump tariffs were due to take effect. Canada's Mark Carney said the…

Canada would match US tariffs "dollar for dollar", says Prime Minister Mark Carney.