My take on how districts would vote.
I think the GOP does relatively well in English-speaking Western Canada, but would crash and burn in Eastern Canada, Quebec, and the Toronto Metro.
I feel mainly unsure of the 2nd Edmonton and Calgary districts, the Fraser Valley District, and some of the Eastern Ontario districts.
I think this makes a good amount of sense. I think my favorite part of this is Ontario. The 905-416/rest-of-Ontario divide would play in the D's favor in the topline but make things hard for them in some areas (especially in IRL ancestral Liberal areas in SW Ontario). The Windsor seat probably would have been Dem pre-2010 and post-GOP since.
I think this is more of an "if annexed prior to WWII" map? Though, given how well the GOP now does in Louisiana and ME-02, wouldn't they start winning Quebec and some of the rural eastern areas sometime between 2000 and 2016?
If Canada joined the Union today, I would expect near unanimous Dem voting outside of the Prairies at the outset.