People need to understand that economic 'union' between Canada and the US is not much different than the existing economic union between Germany and France or Belgium and Netherlands or Spain and Portugal or Austria and Germany or Belgium and Italy or Czech Republic and France or Romania and Greece, etc, etc, etc and etc. If these countries, which in many, many, many cases having been invading, killing, absorbing, persecuting, attempting linguistic, religious, cultural and sociolegal dominancy for centuries against each other, are able to come together for an economical and quasi political union - then why can't Canada and the US (and Mexico, the Caribbean, Central and South America)?
Please stop saying that the sky is falling, the sky is falling. Its not - its the current way that the world is evolving - and to expect that little old Canada, with its 38-40 million 'citizens' (and I question the loyalty of a few million of that number), can change/alter the course of this trend, please rethink your thoughts.