A NSL could set up the gag order, and it could be part of the whole "need to listen to data coming in from abroad" parts of the Patriot Act (though I think USA

A NSL could set up the gag order, and it could be part of the whole "need to listen to data coming in from abroad" parts of the Patriot Act (though I think USA FREEDOM removed some of that?) I think that even in the current state of things there's not much standing for the NSA to force that to happen.