which, by the way, is aimed at you. for the first time since edward snowden fled to russia the fisa law which enables the collection of america s private communications is up for congressional reauthorization. and congress seems poised to approve it quickly. should they. professor, thanks for coming on. thank you. tucker: so i think everyone agrees, essentially i think you want robust intelligence agencies defends you from foreign threats, which are real and are proliferating. so i think we need surveillance. i m just concerned because the bulk of the surveillance is of american citizens and i m not convinced the government does enough to separate them from the potential bad guys. well, you are 100 percent right. it s one of the most complicated problems that we have though tech technologically and legally. terrorism doesn t recognize national boundaries or national citizenship. so, when you want to surveil conversations of bad guys who live in yemen or iran or