The tariffs imposed on Canada by US President Trump have clearly caused economic pain for Canada, but a US senator from Maine says he’s more worried about how Canadians are reacting on a personal level. “Like any neighbours, there’s always going to be issues back and forth, and we’ve been fighting about softwood lumber for as long as I could remember,” Angus King told an international security conference in Halifax on Saturday. “But the deeper problem is the cultural break; the idea that Canadians don’t think of Americans as their friends and neighbours, but as adversaries.” The annual Halifax International Security Forum that opened Friday has attracted more than 300 delegates from around the world, including politicians, academics, government officials, military leaders and non-government organizations. …King said the lingering rift between Canadians and Americans is particularly troubling in a state that borders on New Brunswick and Quebec.