Having just watched this on tape I have to was both shocked and in awe at the magnitude of this mini-series.
We know for a fact that the American water supply is dwindling, and their first port of call for a refill will be north of the border, so why not make a movie about it ?
As political junkie, I can tell you yes a candidate can be elected in a by election, have a leadership race, win it and then become defacto PM, unlikely but possible [which is the basic premise for this whole movie].
Acting was excellent, sets were above average, some scenarios was jaw droppingly plausible, especially the playing of Quebec and First Nations off each other. The idea of solicitor general as being a national hero was a bit of a stretch. However, once the war measures act was dropped he was about the only person in the country that could have done what he did. The mis-use of absolute power under the act played equally in to the hands of both sides here, the sight of tanks on parliament hill was scary enough.
I think this is a plausible future, not much different than the millions of Austrians who were a little shocked when Germany annexed them prior to WW2.
The scenario I would like to see played out would have been what next ? The annexation of Canada by the USA would lead to what ? I envisioned WW3 with Europe and the UK coming to the aid of Canada and a conventional WW3 being fought right here in North America.