The Immigration and Nationality Act of 1952 (), also known as the McCarran–Walter Act, codified under Title 8 of the United States Code (), governs immigration to and citizenship in the United States. It came into effect on June 27, 1952. Before the Immigration and Nationality Act of 1952, various statutes governed immigration law but were not organized within one body of text. According to its own text, the Act is officially entitled as just the Immigration and Nationality Act, but it is frequently specified with 1952 at the end in order to differentiate it from the 1965 law. Legislative history The Immigration and Nationality Act of 1952 was debated and passed in the context of Cold War-era fears and suspicions of infiltrating Communist and Soviet spies and sympathizers within American institutions and federal government. Anticommunist sentiment associated with the Second Red Scare and McCarthyism in the United States led restrictionists to push for selective immigration to preserve national security. Senator Pat McCarran (D-Nevada), the chairman of the Senate Judiciary Committee, proposed an immigration bill to maintain status quo in the United States and to safeguard the country from Communism, "Jewish interests", and undesirables that he deemed as external threats to national security. His immigration bill included restrictive measures such as increased review of potential immigrants, stepped-up deportation, and more stringent naturalization procedures. The bill also placed a preference on economic potential, special skills, and education. In addition, Representative Francis E. Walter (D-Pennsylvania) proposed a similar immigration bill to the House. In response to the liberal immigration bill of Representative Emanuel Celler (D-New York) and Senator Herbert H. Lehman (D-New York), both McCarran and Walter combined their restrictive immigration proposals into the McCarran–Walter bill and recruited support of patriotic and veteran organizations. However, various immigration reform advocacy groups and testimonies by representatives from ethnic coalitions, civil rights organizations, and labor unions challenged proposals of restrictive immigration and pushed for a more inclusive immigration reform. Opponents of the restrictive bill such as Lehman attempted to strategize a way to bring the groups together to resist McCarran's actions. Despite the efforts to resist, McCarran's influence as chairman of the Senate Judiciary Committee ultimately overpowered the liberal immigration reform coalition. President Harry Truman vetoed the McCarran-Walter Act because it continued national-origins quotas that discriminated against potential allies that contained communist groups. However, Congress overrode the veto by a two-thirds vote of each house.