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The aim of the article is the analysis of constitutional oversightof the government su-rveillance in the United States. Referring to Snowden affair and COVID-19 surveillan-ce, the Author discusses the challenges faced by the legislative and judicial branches in pursuing control over the executive’s national security policies. Focusing on the rule of secrecy and other constitutional doctrines and privileges, he tries to explain why effec-tive control of government surveillance is today impossible.