Im not so sure about Mexico. They have their own identity and language while Canada and the US are very similar.

There has also already been discussion on what would happen if Quebec ever actually left Canada. The Maritimes would almost have to join the US. They would be completely isolated by Quebec from the rest of Canada and can not survive on their own. Ontario (maybe BC) is the only province other than Quebec that could act on its own as an Independent entity but they would be land locked (they do have a route to the sea though through the Great Lakes/St Lawrence Seaway). The Prairie Provinces I think would love to join the US but only if the current situation is fixed. BC probably not. Quebec maybe joined with Labrador may try to go it alone.

Im not so sure about Mexico. They have their own identity and language while Canada and the US are very similar.

There has also already been discussion on what would happen if Quebec ever actually left Canada. The Maritimes would almost have to join the US. They would be completely isolated by Quebec from the rest of Canada and can not survive on their own. Ontario (maybe BC) is the only province other than Quebec that could act on its own as an Independent entity but they would be land locked (they do have a route to the sea though through the Great Lakes/St Lawrence Seaway). The Prairie Provinces I think would love to join the US but only if the current situation is fixed. BC probably not.