The Director of National Intelligence has been asked to assess the "foreign weaponization" of adtech data. US lawmakers have asked the Director of National Intelligence Avril Haines to investigate whether "foreign weaponization" of widely available adtech data poses a national security risk, a move that has the potential to deal a major blow to the online ad industry. The ODNI and the office of Chairman of the National Intelligence Committee Rep. Adam Schiff, who filed the amendment, didn't immediately respond to requests for comment. US government agencies themselves have used data from advertising auctions to track mobile phones. "Furthermore, brands — especially those with government contracts — may face a moral dilemma in funding an ecosystem that is deemed to be a threat to national security."

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