The city of El Cajon is suing the state of California over its sanctuary laws.
City leaders argue policies like limiting cooperation with federal immigration agents and providing benefits to undocumented immigrants violate federal law.
The lawsuit follows a 3-to-2 City Council vote to pursue legal action.
State officials, including Attorney General Rob Bonta, say the laws have already been upheld in court and are designed to improve public safety by encouraging crime reporting.