The Progressive Party in Quebec would be quite interesting, but in those years it's hard to see them emerging as the same type of party as they did in the rest of Canada (aka, a rural protest party). They might, instead, emerge as something similar to Paul Gouin's ALN and gain the support of the left-wing of the Liberal Party... but where would Maurice Duplessis, the otl leader of the PCQ go? Would he be a Liberal, meaning that the Liberals provincially become a French nationalist Christian right party? Who would the West Island Anglos end up supporting both federally and provincially?
Real interesting issue for sure, and I look forward to your answers.
And I approve of any scenario in which the Conservatives die