No proposed tariff has ever been universally popular among all Americans. In the early 1900s, a tariff proposal highlighted the tensions between differing interests. Many Americans supported tariffs to discourage monopolies from raising prices. Industrialists believed tariffs on foreign products would protect their business interests. However, a tariff that protected one interest could harm another. New England, which produced no coal, opposed a tariff on that product. But Pennsylvania, a major coal producer, strongly supported the tariff.