"Alberta will never join the United States"
You keep missing the point - Alberta doesn't need to join the US for Canada to collapse,
If Alberta merely becomes an independent country, BC will have to break off from Canada, and if BC and Alberta form seperate country's then Quebec will leave, and then the so will the Maritimes.
But interestingly, there is NO WAY any Province, except Alberta, would even be considered for Application in the Union by the GOP Congress.
At best The Maritimes could hope for is acceptance as US Territories.
Who said anything about Canada collapsing? I was replying to a post that specifically mentioned Alberta joining the United States:
Either way, Alberta should consider joining the USA and become more vocal about the possibility.