Immigration policy , Immigration policy determines who may become a new citizen of the United States or enter the country as a temporary worker, student, refugee, or permanent resident. The federal government is responsible for setting and enforcing most immigration policy.

Meanwhile, states assume a largely supportive role, enacting their own supplementary laws and setting policies that may, for example, determine which public services immigrants can accessservices immigrants can access, establish employee screening requirements, or guide the interaction between related state agencies and their federal counterparts.

Some jurisdictions, including some states, cities, and counties, have adopted policies of not cooperating with federal immigration enforcement; these jurisdictions have become known as sanctuary jurisdictions.