From the Document: "The trade practices of U.S. trading partners and the U.S. trade deficit are a focus of the Trump Administration. Citing these and other concerns, the President has imposed tariff increases under three U.S. laws. [...] Increasing U.S. tariffs or imposing other import restrictions through these laws potentially opens the United States to complaints that it is violating its WTO [World Trade Organization] and free trade agreement (FTA) commitments. Several U.S. trading partners, including China and the European Union, have initiated dispute settlement proceedings and imposed retaliatory tariffs in response. The retaliatory actions also raise questions with regard to their adherence to WTO commitments, which the United States has raised at the WTO."
CRS Insight, IN10943
Congressional Research Service: https://crsreports.congress.gov/