Most to least likely
1. New trade deal with Canada with better terms for USA
2. Alberta becomes 51st state
3. USA joins the Commonwealth
4. Canada leaves the Commonwealth
5. Canada becomes the 51st state, Charles still king
6. Canada becomes the 51st state, trump becomes king of Canada
7. Canada becomes the 51st state, trump becomes king of Canada with USA joining Commonwealth and trump becomes head of the Commonwealth
fuck this would be funny
the reverse uno