How did the harley smoot tariff make the depression worse

It increased 900 import tariffs by an average of 40% to 48%. Most economists blame it for worsening the Great Depression. It also contributed to the start of World War II. In June 1930, Smoot-Hawley raised already high U.S. tariffs on foreign agricultural imports.

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because it took place after the war of 1812 had come to an end.

the speech convinced americans that the ussr was an enemy, rather than an ally, which led to the creation of the truman doctrine.