Put this in the ‘Things Moonbats Do That Backfire‘ folder.
The day after California Governor Jerry Brown signs a bill that prevents local police notifying ICE of illegal alien arrests ICE notifies California their new law forces workplace raids as enforcement actions:

SB54 will negatively impact ICE operations in California by nearly eliminating all cooperation and communication with our law enforcement partners in the state, voiding the delegated authority that the Orange County Sheriff’s Office has under the 287g program, and prohibiting local law enforcement from contracting with the federal government to house detainees.
ICE will have no choice but to conduct at-large arrests in local neighborhoods and at worksites, which will inevitably result in additional collateral arrests, instead of focusing on arrests at jails and prisons where transfers are safer for ICE officers and the community. ICE will also likely have to detain individuals arrested in California in detention facilities outside of the state, far from any family they may have in California.


