From the Document: "On October 18, 2019, the United States imposed additional tariffs on $7.5 billion worth of U.S. imports from the European Union and the United Kingdom (UK) (hereinafter together referred to as the EU). The action, authorized by World Trade Organization (WTO) dispute settlement procedures, followed an investigation by the U.S. Trade Representative (USTR). [...] The authorization to take countermeasures against the EU--the largest amount in the WTO's history--comes after nearly 15 years of litigation at the WTO. The litigation involves the world's two largest aerospace manufacturers, U.S.-based Boeing and EU-based Airbus, which have competed for years for dominance in the commercial airline supply market. [...] Due to the magnitude of U.S.-EU trade (of which civilian aircraft, engines, and parts are a major component) and ongoing trade frictions, some Members of Congress are closely monitoring developments in the WTO litigation and in U.S.-EU negotiations."
CRS In Focus, IF11364
Congressional Research Service: https://crsreports.congress.gov/