Suppose Canada built itself a deep-water port in the turquoise waters of the Caribbean. Suppose that port opened up a new market for Canadian goods -- more than 120 million people live in the Caribbean and nearby Central and South America. .... Suppose Canadian ships carried northward duty-free tropical produce and products from the Caribbean and Latin America. In some locations, food rots for lack of shipping and export markets. Suppose these ships returned with Canadian durable goods -- now scarce on southern shelves. .... Suppose the port doubled as a Canadian military operations base for countries wanting help to...