How does it help being a Trump supporter if you're Canadian?
Why should being Canadian have anything to do with it? The US govt is a glutton right now (a huge inefficient transfer authority through application of force, printing money recklessly and ballooning its debt like there's no tomorrow)...anything that stalls or even reverses its ungainly proliferation is a good thing for the whole world given the size and impact of the US economy.....on Canada and elsewhere.
Outside of economics, I basically see Trump as the lesser of the evils (w.r.t Hillary + Sanders)....and having the potential to break the monotony of the currenty duopoly in US politics. For one, he wouldn't be so incompetent/outright short-sighted to run a private server handling national security matters....nor does he promise profligate govt spending as a cheap means to popularity among the debt saddled youth (i.e encourage more heroin to solve a heroin addicts problem).
Anyway its a long complicated explanation, and its off topic anyways. Maybe we can continue the discussion in another thread.