[…] there is an exceptionally strong public interest in the prevention of terrorist attacks, and telephony metadata analysis can be an important part of achieving that objective. This interest does not merely entail “ordinary crime-solving,” King, 133 S. Ct. at 1982 (Scalia, J., dissenting), but rather the forward-looking prevention of the loss of life, including potentially on a catastrophic scale. Given that exceedingly important objective, and the minimal, if any, Fourth Amendment intrusion that the program entails, the program would be constitutional even if the Fourth Amendment’s reasonableness standard applied.
Moreover, information concerning the use of Section 215 to collect telephony metadata in bulk was made available to all Members of Congress, and Congress reauthorized Section 215 without change after this information was provided. It is significant to the legal analysis of the statute that Congress was on notice of this activity and of the source of its legal authority when the statute was reauthorized.