Go.
Edit: it has came across me that the US will annex Canada in 50 years, all arguments are meaningless.
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America is in a state of social decline which will probably end in some kind of civil war, mostly because of the way your corporate oligarchy has taken a giant shit on 95% of the population. In the aftermath, Canada will probably adopt the New England states, and when the oil dries up, the North Atlantic coastal region will become the new world superpower, since we'll probably be tossed back to the age of sail.