On the campaign trail and in recent days, Donald Trump has detailed extensive plans for immigration crackdowns and mass deportations during his second term as United States president. These initiatives would, he has said, include aggressive operations in areas known as “sanctuary cities” that have laws specifically curtailing local law enforcement collaboration with US Immigration and Customs Enforcement (ICE).With these promises looming, a new report from researchers at the Surveillance Technology Oversight Project (STOP), a pro-privacy nonprofit, details the ways that federal/local data-sharing centers known as “fusion centers” already result…