Was enacted in 1930. This treaty raised tariffs on many imported goods. Many American trading partners retaliated in response to this tariff. It might have even worsened the Great Depression. It reduced international trade.

The Smoot-Hawley Tariff  act

Yes, he did.

the hawley-smoot tariff caused other countries to retaliate, so markets for American goods dried up

the hawley-smoot tariff caused other countries to retaliate, so markets for American goods dried up