From the Document: "The European Parliament (EP) is the only directly elected institution of the 27-country European Union (EU). The EP's 705 members represent the EU's roughly 445million citizens. The most recent EP elections were in May 2019. The EP has accumulated more power over time as part of EU efforts to improve democratic accountability and transparency in EU policymaking. Enhanced powers since the 2009 Lisbon Treaty have made the EP a more important actor on several issues of U.S. concern, including trade, data privacy, and counterterrorism. Congress-EP ties are long-standing, and Congress may be interested in EP activities given the EP's potential to influence key aspects of U.S.-EU relations."
CRS In Focus, IF11211
Congressional Research Service: https://crsreports.congress.gov/