if canada can't compete in the steel industry, it should shift to the production of goods it can compete in. that's what ricardan theory is supposed to teach us. adding tariffs to save canadian steel production when it simply can't compete is stupid and counterproductive
meanwhile, if the americans want to dramatically increase the cost of building by forcing domestic production, it's local economy can and will suffer the consequences of that. this will not benefit them in the long run, it will just lead to less manufacturing.