<h1>Federal Government Challenges Local Sanctuary Policies Blocking Immigration Enforcement Cooperation Under Contested Legal Framework</h1> The Trump administration filed a lawsuit against four New Jersey cities over their sanctuary policies, which limit local police cooperation with federal immigration enforcement. The Justice Department seeks to halt these policies, arguing that local governments cannot obstruct federal immigration law enforcement. The cities, led by Democratic mayors, defend their policies as protecting community safety and promoting inclusivity, while the state's attorney general supports similar immigrant trust directives.