protectionist

As a noun: a person who advocates or supports protectionism, particularly the use of tariffs or other measures to protect domestic producers from foreign competition. In nineteenth-century Britain, protectionists were chiefly associated with agricultural interests and opposition to free trade; the term later applied especially to advocates of protecting British industry. As an adjective: relating to, supporting, or favouring protectionism; for example, a protectionist policy, tariff, or government.