What was American President Herbert Hoover’s biggest mistake when faced with the Great Depression? The approval of the Smoot-Hawley Act in 1930 which placed tariffs on imported goods was Hoover’s biggest mistake.
Unable to get Congress to agree on any economic policies during his entire term of office was a big mistake by President Hoover.
The biggest mistake of Hoover’s administration was making Franklin Roosevelt his Secretary of Commerce.
President Hoover’s biggest mistake when dealing with the Great Depression was signing the Treaty of Versailles.