Last year, California lawmakers passed three immigration-related laws that feature prominently in the new lawsuit. One bars private employers from voluntarily cooperating with federal immigration officials and requires businesses to notify workers in advance of a federal raid.
A second law restricts state and local law enforcement from voluntarily sharing information with the feds about the release dates of undocumented people in their custody. That law also bars the transfer of undocumented people into federal custody. The third law under federal challenge covers state inspections of detention facilities that hold noncitizens in federal custody.