Thirty-four members of Congress are demanding that DHS and ICE provide detailed information about how tools developed by Palantir and “a range of surveillance companies” are fueling Trump’s ongoing immigration crackdown, according to a letter shared exclusively with WIRED. On Thursday, the lawmakers sent the letter to DHS secretary Markwayne Mullin and acting ICE secretary Todd Lyons. It outlines significant concerns they have about how DHS uses software developed by Palantir, as well as facial recognition from Clearview AI, social media surveillance tools from PenLink, cell tower simulators from L3Harris, and and cellphone surveillance tech built by Paragon Solutions. The lawmakers claimed that the suite of tools could be used to “compile, aggregate, and analyze large volumes of personal data and information,” and they questioned “what safeguards exist, if any, to prevent the misuse and collection of sensitive personal information.” The letter included several specific questions about Palantir, including which “government and/or commercial datasets and information, if any,” are integrated into systems developed by the company. They also asked about a Palantir-developed app called ELITE, short for Enhanced Leads Identification and Targeting for Enforcement. Lawmakers requested a “comprehensive report” about the tool, including information about its development, its purpose, the specific categories it applies to data, and the current number of DHS officials authorized to use it. The letter demands a response from ICE and DHS no later than April 24