Immigration Policy: Overview of Current Law and Legislative Proposals

The Immigration and Nationality Act of 1952 (INA), as amended, provides the fundamental framework for U.S. immigration law. The INA establishes categories of admissible immigrants, sets numerical limits on visa issuance, defines grounds for inadmissibility and deportability, and outlines the naturalization process. Major amendments to the INA include the Immigration Act of 1990, which restructured the preference system and created the diversity visa program, and the Illegal Immigration Reform and Immigrant Responsibility Act of 1996 (IIRIRA), which expanded grounds for removal and created expedited removal procedures.

The U.S. immigration system operates through two primary channels: family-based immigration, which allows U.S. citizens and lawful permanent residents to sponsor certain relatives, and employment-based immigration, which provides visas for workers with specialized skills, advanced degrees, or extraordinary abilities. Temporary nonimmigrant visa categories, including H-1B, L-1, and O-1 visas, allow foreign nationals to work in the United States for limited periods. The diversity visa lottery allocates up to 55,000 visas annually to nationals of countries with historically low rates of immigration to the United States.

Under current law, the total number of family-sponsored preference visas is capped at approximately 226,000 per year, while employment-based preference visas are limited to 140,000 annually. Per-country limits restrict any single nation from receiving more than 7% of the total visas in each category, creating significant backlogs for nationals of high-demand countries such as India, China, Mexico, and the Philippines. Immediate relatives of U.S. citizens (spouses, unmarried minor children, and parents) are exempt from numerical limitations.

The enforcement framework includes the Department of Homeland Security's three principal immigration agencies: Customs and Border Protection (CBP), Immigration and Customs Enforcement (ICE), and U.S. Citizenship and Immigration Services (USCIS). CBP is responsible for border security and inspections at ports of entry, ICE handles interior enforcement and removal operations, and USCIS adjudicates immigration benefits applications. The immigration court system, administered by the Department of Justice's Executive Office for Immigration Review (EOIR), currently faces a backlog exceeding 3 million cases.

Congress has considered several approaches to comprehensive immigration reform. One approach would combine border security enhancements with a legalization program for qualifying undocumented immigrants, along with changes to the legal immigration system. Specific proposals have included increasing employment-based visa allocations, eliminating per-country caps, creating new temporary worker programs for agricultural and service sector workers, and establishing merit-based point systems that prioritize education, skills, and English proficiency. Some proposals would mandate the use of E-Verify for employment eligibility verification nationwide.

Alternative approaches focus on incremental reforms, such as standalone legislation addressing DACA recipients, agricultural worker legalization through the Farm Workforce Modernization Act, or targeted changes to specific visa categories. Border security proposals range from physical infrastructure investments to technology-based surveillance systems and increased personnel for CBP and the immigration courts.

In 2024 and 2025, executive actions have significantly shaped immigration policy in the absence of comprehensive legislation. These include changes to asylum processing procedures, parole programs for nationals of specific countries, and modifications to public charge rules. Congressional activity has included hearings on border security, oversight of asylum processing, and debate over appropriations for immigration enforcement agencies. Several bipartisan proposals have emerged addressing border security funding and asylum reform, though comprehensive immigration legislation remains elusive.