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http://www.washingtonpost.com/blogs/the-fix/wp/2013/02/21/how-immigra...
History of immigration regulation in US
From Wiki:
Shortly after the U.S. Civil War, some states started to pass their
own immigration laws, which prompted the U.S. Supreme Court to rule in
1875 that immigration was a federal responsibility.[4] The Immigration
Act of 1891 established an Office of the Superintendent of Immigration
within the Treasury Department.[5] This office was responsible for
admitting, rejecting, and processing all immigrants seeking admission
to the United States and for implementing national immigration policy.
'Immigrant Inspectors', as they were called then, were stationed at
major U.S. ports of entry collecting manifests of arriving passengers.
Its largest station was located on Ellis Island in New York harbor.
Among other things, a 'head tax' of fifty cents was collected on each
immigrant.
Paralleling some current immigration concerns, in the early 1900s
Congress's primary interest in immigration was to protect American
workers and wages: the reason it had become a federal concern in the
first place. This made immigration more a matter of commerce than
revenue. In 1903, Congress transferred the Bureau of Immigration to
the newly created (now-defunct) Department of Commerce and Labor, and
on June 10, 1933 the agency was established as the Immigration and
Naturalization Service.[1]
After World War I, Congress attempted to stem the flow of immigrants,
still mainly coming from Europe, by passing a law in 1921 and the
Immigration Act of 1924 limiting the number of newcomers by assigning
a quota to each nationality based upon its representation in previous
U.S. Census figures. Each year, the U.S. State Department issued a
limited number of visas; only those immigrants who could present valid
visas were permitted entry.
There were a number of predecessor agencies to INS between 1891 and
1933. The Immigration and Naturalization Service (INS) was formed in
1933 by a merger of the Bureau of Immigration and the Bureau of
Naturalization.[5]
Both those Bureaus, as well as the newly created INS, were controlled
by the Department of Labor. President Franklin Roosevelt moved the INS
from the Department of Labor to the Department of Justice in 1940.[5]
In November 1979, Attorney General Benjamin Civiletti announced that
INS raids would only take place at places of work, not at residences
where illegal immigrants were suspected to live.[6]
Someone named Dietrich in this thread calls undocumented aliens:
"cancer cells loose in America". More on that later.
.