Came across this, thought I might just leave it here for you to debate.
Washington Post Article

-Photo from Link
It irks me that they call it the 11 American nations. I don't live in America, I live in Canada, and (no offence to my lovely southern neighbours, and my extended family) I don't want to be associated with America.
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On the merger, I could see an economic union working, but I would be extremely wary on giving American enterprise full-reign to do what they please in Canada. I think the EU has worked okay because many of the countries have similarly sized economies, meaning no one country dominates. But the German/Portuguese/Greek/Irish divide illustrates that one country's size and economic might can potentially cripple another smaller country. In Canada, we're that smaller country.
I would be 100% in favour of easing border restrictions, and letting goods travel easily between the countries, but first and foremost we need to fix those problems between the provinces. If total free-trade between provinces works, then we can talk about Canada-US open economic tie.