Before President Trump assumed office, domestic authority for imposing tariffs on imports that threaten the national security had been used sparingly, and not for 15 years. His administration has already relied on Section 232 of the Trade Expansion Act of
The Trump administration has embarked on two investigations to determine whether imports of steel and aluminum are threatening the national security of the United States, under a law that has not been used for 15 years. On April 19, 2017, the Department of