On truly contentious relations

The Globe and Mail points out a set of war plans from the 1920s and 1930s involving both the U.S.' strategy to invade Canada, and Canada's planned response (featuring attacks on the northern U.S., and possibly an attempt to conquer Alaska). Both the Washington Post and a current Canadian spokesperson rightly laugh at the suggestion the past plans would be of any significance today. But is it time to start taking bets as to how long it'll take a U.S. neocon to use Canada's 80-year-old plan of counterattack as reason to invade preemptively?