I think it should have been done, or at least monitored and not left to become a dependency, a very long time ago. Canada is the second largest country in the world, it is silly to trade outside of Canada rather than keep our money here, supporting and building Canada. Of course, there are no time machines. So the marketing war with the US just goes on. A waste of time and energy which could be put to better use. If the decision is made to stop trade with the US then stop and move on from there. A cut off had to happen sometime. Now is good.