The U.S. has imposed protective tariffs in the past. How did that go?

The last time the U.S. imposed steel tariffs, in 2002, they were abandoned within less than two years. A 2003 report commissioned by industries that consumed steel estimated that the Bush steel tariffs cost in excess of 200,000 jobs—or more than the total number of people then employed in the entire steel industry at the time. This time the results are expected to be even worse.