Canadian Prime Minister Mark Carney said on Sunday that his country's strong economic ties to the US have turned from strength into weakness.   "The world is more dangerous and divided," Carney said in a 10-minute video address, adding that "the US has fundamentally changed its approach to trade, raising its tariffs to levels last seen during the Great Depression." "Many of our former strengths, based on our close ties to America, have become weaknesses. Weaknesses that we must correct," Carney