This hypothesis would predict political unity between US and Canadian Wizards (same language, similar culture, divided by an arbitrary line drawn by muggles as a result of a series of conflicts that wizards probably don't care about). Does anyone remember hearing anything in Rowling!canon or MoR!canon about an independent magical Canada existing?

Edit: on further consideration, what it would actually predict would be unity between US and anglophone Canadian; if I recall my history right, the union of French and English speaking Canadians was also a result of muggle conflicts that wizards wouldn't care about.