It is difficult to be a law enforcement family. You shoulder the stresses and challenges involved in your loved one's profession. You make a sacrifice, too.
An attorney general's duty is to render her opinion and honest advice; she cannot set herself up as a judge overruling the president's decision. The president need not 'convince' his subordinate that his decision reflects the best view of the law.
Like everybody else, criminals of all stripes increasingly rely on wireless communications, hand-held devices, and the Internet.