Many acts of Congress and executive actions relating to immigration to the United States and citizenship of the United States have been enacted in the United States.
Most immigration and nationality laws are codified in Title 8 of the United States Code.
Naturalization Act of 1798 "An unintended consequence of the 1920s legislation was an increase in illegal immigration.
Many Europeans who did not fall under the quotas migrated to Canada or Mexico, which [as Western Hemisphere nations] were not subject to national-origin quotas; [and] subsequently they slipped into the United States illegally.
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