Say the Russians keep Alaska, and over time, gain more land in present-day Canada, which are filled by Russian migrants.
Is it possible for Canada to be formed as a predominantly ethnically Russian nation, or at the very least a nation with a huge Russian minority?
Would it be possible for them to coexist with the British and French settlers on the eastern coast in some sort of Anglo-Russo-French state, or would there likely be multiple states carved out of what is now Canada?
What would relations with the US be like?