Trump might actually help Canada in some areas like this.  When a plant moves from the US to Mexico it pretty well takes all the supply chain of car parts with it to Mexico.  Building in places like Michigan will mean that secondary companies producing car parts some of which are in Canada could benefit from this new attitude from the US.  

Not to mention that the standard of living in Canada is similar to the US but when Mexico comes into the fold it completely unbalances the playing field with people making 200 bucks a week rather than a day.