Tariff
A tariff is a tax on imports or exports between sovereign states. It is a form of regulation of foreign trade. It is a policy that taxes foreign products to encourage or protect domestic industry. It helps limit trade deficits. The tariff is historically used to protect infant industries and to allow import substitution industrialization.
Tariff in United States history
Lincoln did not see a tariff as a tax on low-income Americans because it would only burden the consumer according to the amount the consumer consumed.
By the tariff system, the whole revenue is paid by the consumers of foreign goods… the burthen of revenue falls almost entirely on the wealthy and luxurious few, while the substantial and laboring many who live at home, and upon home products, go entirely free.