Most historians look back on Smoot-Hawley as a mistake that made a bad economic climate much worse. But tariffs have a new champion in President Donald Trump. President Herbert Hoover signed the Smoot-Hawley Tariff Act in 1930, even as many economists warned that the levies would prompt retaliatory tariffs from other countries, which is precisely what happened. The U.S. economy plunged deeper into a devastating financial crisis that it would not pull out of until World War II. WASHINGTON (AP) — In the early days of the Great Depression, Rep. Willis Hawley, a Republican from Oregon, and Utah Republican Sen….