Otherwise known as the McCarran-Walter Act, the Immigration and Nationality Act of 1952 was meant to exclude certain immigrants from immigrating to America, post World War II and in the early Cold War. The McCarran-Walter Act moved away from excluding immigrants based simply upon country of origin. Instead it focused upon denying immigrants who were unlawful, immoral, diseased in any way, politically radical etc. and accepting those who were willing and able to assimilate into the US economic, social, and political structures, which restructured how immigration law was handled. Furthermore, the most notable exclusions were anyone even remotely associated with communism which in the early days of the Cold War was seen as a serious threat to US democracy. The main objective of this was to block any spread of communism from outside post WWII countries, as well as deny any enemies of the US during WWII such as Japan and favor “good Asian” countries such as China. The McCarran-Walter Act was a strong reinforcement in immigration selection, which was labeled the best way to preserve national security and national interests. President Truman originally vetoed the law, deeming it discriminatory; however there was enough support in Congress for the law to pass.
Patrick Anthony "Pat" McCarran (August 8, 1876 – September 28, 1954) was a Democratic United States Senator from Nevada from 1933 until 1954. McCarran was born in Reno, Nevada, attended the Nevada State University, and was a farmer and rancher. In 1902 he won election to the Nevada Assembly, but in 1904 he was an unsuccessful candidate for the Nevada State Senate. He completed private law studies and was admitted to the bar in 1905; in 1906 he won election as Nye County's district attorney. He served a two-year term, after which he relocated to Reno.
From 1913 to 1917, McCarran was an associate justice of the Supreme Court of Nevada, and he served as chief justice from 1917 to 1919. In 1932 McCarran defeated Republican incumbent Tasker Oddie for Nevada's Class 3 Senate seat; he was reelected three times, and served from 1933 until his death. In his Senate career, McCarran served as chairman of the District of Columbia, Judiciary, and Joint Foreign Economic Cooperation Committees. He died in Hawthorne, Nevada and was buried in Reno.