S. 669 proposes that the United States terminate its membership in the United Nations, including all its agencies and related bodies, and end all UN-related agreements and contributions. It seeks to repeal the United Nations Participation Act of 1945, close the U.S. Mission...
Simple Explanation
S. 669 is a proposal for the United States to leave the United Nations, which would mean the U.S. stops helping and working with this big group of countries and their projects, like keeping peace and working on health issues.