"Trump also rejected pleas from companies that are heavy users of steel and aluminum, including automakers and the beer industry, which warned that higher prices would hurt sales and potentially lead to layoffs. In 2002, the last time the United States imposed steel tariffs, steel users blamed the measures for the loss of up to 200,000 jobs.
Steel prices began moving Thursday as word of the tariffs leaked. One benchmark, for hot-rolled coil steel, posted a two-day rise of nearly 13 percent.
The aluminum tariff is forecast to create around 1,900 jobs and smelters — but will destroy 23,000 to 90,000 jobs in other manufacturing sectors, said Jorge Vazquez, managing director of Harbor Aluminum.""