Earlier quoted context omitted.
These networks would be under the white house communications agency, a subset of the defense information systems agency which is not affiliated with NSA. Supposedly his blackberry is run through NSA (See, e.g., the fishbowl project), and was not implicated in this breach.
Point missed. It's not that it's the President's email that's vulnerable. It's that _all_ people's email is vulnerable. Some of those people are key to national security, many aren't. But they all deserve privacy and protection. And yes, one of NSA's mandates is to secure U.S. communications: "The Information Assurance mission confronts the formidable challenge of preventing foreign adversaries from gaining access to…
No, their mandates is to secure military and national security systems. From your own link, their responsibilities with respect to information assurance are (emphasis mine):
- Act as the National Manager for National Security Systems as established in law and policy, and *in this capacity be responsible to the Secretary of Defense and to the Director, National Intelligence*
- Prescribe security regulations covering operating practices, including the transmission, handling, and distribution of signals intelligence and communications security material *within and among the elements under control of the Director of the National Security Agency*
(1) National security system.— In this section, the term “national security system” means a telecommunications or information system operated by the Federal Government, the function, operation, or use of which—
(A) involves intelligence activities;
(B) involves cryptologic activities related to national security;
(C) involves command and control of military forces;
(D) involves equipment that is an integral part of a weapon or weapons system; or
(E) subject to paragraph (2), is critical to the direct fulfillment of military or intelligence missions.
(2) Limitation.— Paragraph (1)(E) does not include a system to be used for routine administrative and business applications (including payroll, finance, logistics, and personnel management applications).
Most of the efforts to bring the NSA and the rest of the intelligence agencies into the fold with regards to securing U.S. communications at large have been heavily protested: [4][5]
[1] https://www.law.cornell.edu/uscode/text/40/11103
[2] http://csrc.nist.gov/publications/nistbul/csl91-02.txt
[3] http://www.disa.mil/Careers/WHCA
[4] https://en.wikipedia.org/wiki/Cyber_Intelligence_Sharing_and...
[5] https://en.wikipedia.org/wiki/Cybersecurity_Information_Shar...