The Tariff Act of 1930, commonly known as the Smoot–Hawley Tariff or Hawley–Smoot Tariff, was a law that implemented protectionist trade policies in the United States. Sponsored by Senator Reed Smoot and Representative Willis C. Hawley, it was signed by President Herbert Hoover on June 17, 1930. The act raised US tariffs on over 20,000 imported goods. From Wikipedia