Trudeau’s support is geographically clustered in areas with many parliamentary seats and which gain more every decade or so due to immigration-fueled population growth, Canada’s parliamentary system being based on representation.

He has support in Montreal and much of Quebec and the Greater Toronto area, as well as southern Ontario, with little support elsewhere.

Those two areas are all he really needs to eke out a minority government. This is what happens when your massive federal state has no electoral college.