Unsatisfied with having an increasingly vast swath of the federal government and a coalition of willing red states at his disposal, President Donald Trump is trying old and new tactics to either coerce sanctuary states to get on board with his mass deportation agenda or neutralize their defenses.

The stakes for California go beyond its roughly 1.8 million undocumented residents.

The Trump administration’s renewed efforts to cancel funding to so-called sanctuary cities and states would imperil programs serving all aspects of Bay Area society, according to declarations filed by officials in San Francisco, Santa Clara County and elsewhere.

Article continues below this ad

Meanwhile, the administration is reportedly close to a deal for the Internal Revenue Service to turn over the addresses of about 700,000 people being sought by the Department of Homeland Security for immigration-related infractions, according to a federal lawsuit attempting to stop the unprecedented access.

The IRS represents the largest source of names and addresses for people not authorized to be in the U.S. Penetrating its confidential trove would effectively nullify the data-sharing firewalls erected by sanctuary states like California — while also signaling to the broader American public the lengths the Trump administration will go to find people it considers enemies, say immigration advocates, attorneys and policy analysts.