1. United States
2. Ill.
3. Letter

I am writing to formally petition you regarding reports that Immigration and Customs Enforcement (ICE) is using tools capable of monitoring or querying location data from phones across entire neighborhoods without a warrant or individualized suspicion. As a constituent, I am deeply concerned that this form of surveillance undermines core constitutional protections, particularly the Fourth Amendment’s prohibition against unreasonable searches. Mass collection or querying of location data does not resemble targeted law enforcement. Instead, it functions as dragnet surveillance that sweeps up the movements and associations of innocent people who are not suspected of any crime. The Supreme Court has made clear in cases such as Carpenter v. United States that long-term and aggregated location data is uniquely invasive and deserving of constitutional protection. Purchasing or accessing commercially available location data should not be used as a loophole to bypass judicial oversight. The Constitution does not permit the government to do indirectly what it cannot do directly. Of particular concern is the reported scale of this surveillance. Monitoring entire neighborhoods inevitably captures sensitive information about families, children, religious activity, medical visits, political association, and daily life. This chills free movement and lawful expression, especially in immigrant communities, and erodes trust between the public and government institutions. I respectfully ask that you: • Demand transparency regarding what tools are being used, how they function, and under what authority • Support legislation requiring warrants for access to precise or aggregated location data • Oppose funding for warrantless, bulk location surveillance programs • Conduct or support congressional oversight hearings on this issue National security and immigration enforcement do not require abandoning constitutional safeguards. Upholding civil liberties is not optional—it is the foundation of legitimate governance. I ask that you take this matter seriously and respond with your position and any actions you intend to take.