An expert on insurgency says an American military incursion into Canada would be a disaster — for the United States. A military move by President Donald Trump could eventually destroy America’s worldwide power, says Dr. Aisha Ahmad, an associate professor at the University of Toronto. Dr. Ahmad has studied insurgencies and visited many conflict zones for more than 20 years. She sees a pattern of resistance that repeats itself every time. Article content When a country gets invaded, a growing portion of the people fight back. Would Canadians do that? You bet we would, Ahmad says. Canadian “niceness” is a...