The main purpose of this legislation is to require the Congressional Budget Office (CBO) to conduct a comprehensive study on the long-term economic effects of immigration policies implemented during the Trump Administration. The study aims to provide insights into how these policies have impacted various aspects of the economy over a period of 20 to 40 years. Key provisions of the legislation include a mandate for the CBO, in collaboration with the Council of Economic Advisers, to assess several specific areas.