History of Immigration Law:
The main source of statutory law is the Immigration and Nationality Act (INA), originally passed in 1952 and was replaced after 2001.Immigration and Nationality Act of 1965 ( H.R. 2580; Pub.L. 89–236, 79 Stat. 911.) was enacted June 30, 1968, also know as the Hart-Celler Act. This act change the way quotas were allocated by ending the National Origins Formula that had been in place in the United since the Emergency Quota act of 1921. This created a new policy based on reuniting immigrant families and attracting skilled labor to the United States. Over the next four decades, the policies put into effect in 1965 would greatly change the demographic makeup of the American population, as immigrants entering the United States under the new legislation came increasingly from countries in Asia, Africa and Latin America, as opposed to Europe.
.After September 11, 2001, the Homeland Security Act of 2002 created the Department of Homeland Security (Pub. L. No. 107-207, 116 Stat 2135).
The Department of Homeland Security has three agencies.
Read more about Historical Immigration Policies.