As a result, Federal Law concerning immigration and naturalization to the United States enjoys “federal supremacy,” which means the Federal Law applies to all 50 States regardless of how state and local governments might feel about it. Many in our country are “guests” or may be “residents,” but not legal Citizens with the same Rights as legal Citizens. U.S. Immigration LawAlthough Congress created the laws governing immigration and naturalization, Congress is not itself, a “law enforcement” body. The duty of enforcing our Federal Immigration Laws was first assigned to the “Immigration and Naturalization Service (1933)” which is now under The Department of Homeland Security after the foreign terrorist attacks on September 11, 2001, as is the U.S. Customs Service, combined now referred to as I.C.E. “We don’t like Trump’s immigration policy.”But our Immigration Laws did not come from Trump.