As I posted above, this would be my suggestion for American negotiators:
I think that US negotiators would let Canada have its independence. Why go through all the trouble (money and lives) to hold onto a place that doesn't want you. In return, the US would likely get reparations from Canada and possibly Britain. Canada would probably have to demilitarise and may have to allow US use of Halifax Naval base. It would make far more sense for the Americans to treat the Canadians with respect, try and wean them away from Britain, than destroy their country and expect them to want to be Americans. Only as a last resort should the Americans annex Western Canada.
I think that US negotiators would let Canada have its independence. Why go through all the trouble (money and lives) to hold onto a place that doesn't want you. In return, the US would likely get reparations from Canada and possibly Britain. Canada would probably have to demilitarise and may have to allow US use of Halifax Naval base. It would make far more sense for the Americans to treat the Canadians with respect, try and wean them away from Britain, than destroy their country and expect them to want to be Americans. Only as a last resort should the Americans annex Western Canada.