Pretty good, and equally unlikely and likely, but an interesting and fairly valid idea in any case. Misleading, but captivating throughout.
I thought it was most interesting because I live in Canada and that's probably the only Canadian Politics movie I've ever seen in my life.
Worth seeing if you're interested in politics and stories like it, but it tends to drag on sometimes, and much concentration is required to keep track of who's who and what's going on.
When I first started watching it sort of reminded me of Wag The Dog, which takes place in the United States and has Robert De Niro and Dustin Hoffman in it. It's very well done, perhaps more so than this movie, but it depends on what you like. As the movie progresses, of course, the similarities end, but Wag The Dog is worth seeing too.
Otherwise excellent.