From the Document: "The United States is the single largest financial contributor to the United Nations (U.N.) system. Congress has long debated the appropriate level of U.S. funding to U.N. system activities and whether U.S. contributions are used efficiently and effectively. U.S. policymakers' perspectives on U.N. funding have varied over time. Most recently, the Trump Administration consistently proposed significant overall decreases in U.N. funding; however, Congress generally funded most U.N. entities at higher levels than the Administration requested. At the same time, the Trump Administration also withheld or halted funding to several U.N. bodies. The Biden Administration has supported reengaging with the United Nations; the President's FY2022 budget request proposes fully funding U.N. entities and paying selected U.S. arrears."
CRS In Focus, IF10354
Congressional Research Service: https://crsreports.congress.gov/