Vive le Québec libre.
Anyway, that "nation within Canada" declaration is just words, there's nothing concrete behind it, the Inuits in the north have been recognized as a nation for years and that didn't change anything for them or Canada, so the Anglo-Saxon majority can relax, it won't lose its supremacy.
And even if Québec became independant one day, the rest of Canada wouldn't have to stay cut in half, it could simply merge with the US (except for the Inuit part i guess), it's not like there's any difference between the Anglo-Saxons living north of the 49th parallel and those living south of it.