The bill H. R. 1498 proposes to terminate the United States’ membership in the United Nations and withdraw from all its associated bodies, agencies, and agreements. It seeks to repeal the United Nations Participation Act of 1945 and the United Nations Headquarters Agreement...
Simple Explanation
The bill wants the United States to leave the United Nations and stop giving it any money or help, which means they won't work together on big world problems anymore. If the U.S. ever wants to join again in the future, the Senate must agree first.