No one should imagine that what NSA has done, if reports are accurate, is normal behavior or standard procedure in the interaction between a private communications network and the government. In an authoritarian country without a bill of rights and with state ownership of the communications network, such eavesdropping by people and computers is assumed to exist. But in the United States it is assumed not to occur, except under very carefully defined circumstances that, according to reports, were not present as NSA allegedly arm-twisted telephone companies into compliance. That is a topic that can't be avoided in the general's hearing, if he gets that far.
In a follow-up post Greenwald explains why this is basically illegal, except in "I'm the Decider" world where the president gets to be all 3 branches of government rolled up into one pathetic little boy.