NSA Also Spies Members Of Congress

Does NSA really spies member of U.S. Congress?..The firm has given a reply to Vermont Senator Bernie Sanders’ letter which is stating that NSA treats Congress and other elected officials as a regular citizens.

This is what was the actual letters by NSA, courtesy The Guardian:

NSA’s authorities to collect signals intelligence data include procedures that protect the privacy of US persons. Such protections are built into and cut across the entire process. Members of Congress have the same privacy protections as all US persons. NSA is fully committed to transparency with Congress.

This statement is something which really means positive, however many questions also arises due to this statement, as it could be members of Congress might be using hacked iPhones or other devices with NSA backdoors?