Donald Trump, the presumptive presidential nominee for the Republican Party, vowed to “save” the U.S. steel industry when he was running in the 2016 elections. After becoming president, Trump imposed a 25% tariff on steel imports after invoking Section 232 of the Trade Expansion Act of 1962. The tariffs were imposed after a Commerce Department report found that steel imports were a threat to “U.S. national security.” Those tariffs have since been greatly watered down. The process began under Trump’s watch, and the tariffs on steel imports from Canada and Mexico were lifted in May 2019. In 2021…