a tariff is just a tax. a tax on anything is a tax on everything. this is due to the law of economics which states that everyone's spending is everyone else's income. this isn't to say tariffs are bad, they can be good if they are applied in a very surgical and strategic way. countries, such as japan, used very specific tariffs to incubate their auto industry because they never had an auto industry before. they then ended the tariffs when their newly formed auto-industry was able to self-sustain. another benefit of tariffs is to keep a limited amount of domestic industry in case of war, for example the usa has tariffs on steel to prop up the steel industry so that if there was ever a war the usa would have a steel industry to supply the military. broad market tariffs, however, do not work, they are not strategic. they cause prices to increase, which decreases income, or exporter firms to absorb the costs and make less profits (which in turn decreases investment, etc.).
Canada