@cteavin:
I'm all for cloning Justin Trudeux so that we can all of a piece of that beautiful man but annexing or joining Canada to our imperfect union? Wouldn't work. Our cultures and history are too different. For one, the race problem is 180 degrees different in Canada and in this present moment, all the problems that have come from our history of slavery and Jin Crow are still defining the US.
Canada also has race problems; primarily against indigenous populations but anti-black and nationalists sentiments exist as well.
Besides, while Canada is a sovereign nation, it still remains part of the British Commonwealth as a Commonwealth Realm and member of the Commonwealth of Nations. Canada has a governor general and Queen Elizabeth II is officially listed as their monarch. Same goes for Australia and our other neighbors the Bahamas, Barbados, and Jamaica.
The United States would either have to annex Canada, as proposed in 1866, or enter into an open boarder and trade agreement with all of the British Realm. I don't see either happening.