So, lets say that, by some POD, (don't really care what, maybe the Quebec offensive really lucks out, maybe the Continental Congress gets Nova Scotia to join as a 14th colony, whatever) results the British completely withdrawing from North America at the end of the American Revolution. My question is, how would "Canada" develop as part of the United States, and how would the inclusion of Canada affect the US. Specifically:
1) How would Quebec fit into the union? Would there be a large amount of cultural tensions between it and the rest of the US? Would Quebec seccessionism in the 19th century be a possibility, and is there any chance of Quebec and Southern seccessionists forming some kind of tactical alliance? (ie, they both want to leave the US, but for different reasons)
2) Assuming Quebec doesn't leave, would America's sense of itself be affected by the fact that part of it is very different, culturally and religiously, from the rest of it?
3) Where would the loyalists go? And who settles *Ontario in their absence-Quebec or the Anglophone US?
4) Would the various parts of *Canada be tied economically to each other as much as OTL? In particular, would be see anything like the Canadian Pacific railway?
5) How would having Canada's resources and population affect the economic and political development of the US?