Which U.S. document governs immigration policies?

The Immigration and Nationality Act is the primary U.S. law that governs immigration policies. Enacted in 1952, this act establishes the rules and regulations pertaining to the admission, exclusion, and deportation of non-citizens in the United States. It outlines various categories for immigrants, provides criteria for visas, and affects naturalization processes. By focusing specifically on immigration, this act plays a crucial role in shaping the flow of people into the country and determines how immigrants can become U.S. citizens.

Other documents like the Constitution and the Bill of Rights set foundational principles for governance and individual freedoms but do not specifically address immigration policies. The Declaration of Independence, while significant in articulating the nation's ideals and justifying independence from British rule, does not relate to the mechanics of immigration law. Thus, the Immigration and Nationality Act stands out as the key document in this context, clearly establishing the framework for U.S. immigration policy.