President Donald Trump says that he will impose new tariffs on foreign steel and aluminum American companies buy. https://www.npr.org/2018/03/08/591744195/trump-expected-to-formally-order-tariffs-on-steel-aluminum-imports
Whether this improves the fortunes of domestic producers of these products or sets off a trade war remains to be seen, but Social Law members have access to many resources to help advise clients who import or export products of every kind.
U.S. Customs: A Practitioner’s Guide to Principles, Processes and Procedures http://encore.socialaw.com/iii/encore/record/C__Rb1142872
International Trade Practice http://encore.socialaw.com/iii/encore/record/C__Rb1142872
Corporate Counsel’s Guide to Importing Under the U.S. Customs Laws http://encore.socialaw.com/iii/encore/record/C__Rb1132678
International Trade Answer Book: U. S. Customs Laws and Regulations http://encore.socialaw.com/iii/encore/record/C__Rb1144128