Legal battles between the U.S. Department of Justice and so-called “sanctuary” jurisdictions have so far focused on federal grant money, but a lawsuit the department filed against California over its immigration laws may lead to a host of new lawsuits with municipalities that, like Philadelphia, limit local law enforcement’s interactions with immigration officials.

On Tuesday, the DOJ sued California, Gov. Jerry Brown and Attorney General Xavier Becerra, seeking to block recently enacted state laws that limit what information local law enforcement officers can share with immigration officials.