The Trump administration has filed a lawsuit against New York City over its 'sanctuary city' policies. These policies generally prevent local law enforcement from detaining individuals solely based on their immigration status. The lawsuit argues that New York's policies obstruct federal immigration enforcement efforts and endanger public safety. The administration seeks to compel New York to cooperate with federal immigration authorities. Similar policies in other cities have also faced legal challenges from the federal government, raising complex questions about the balance of power between federal and local authorities on immigration matters.