two years later he retired and i became the head of the postal policy -- >> kevin kosar has joined us a few times to talk about post office reform efforts moving through congress. we'll talk about during this segment. we have a special line for postal workers. 202-748-8003 is that number. i want to come back to the package delivery that the postal service does. 5.7 billion pieces in 2017. that's up from 3.7 billion pieces just five years earlier. is this a place where the post office is making money? >> well, it's hard to tell. and you would think, why shouldn't it be easy to figure out, you know? revenue minus cost equals whether or not you have a profit. the postal service is a massive enterprise. figuring out how you attribute a particular cost is way more complicated than you might expect, especially in a time of rapid growth. the number of parcels they're carrying has quintupled in ten years. >> i want to talk about the biggest expense for the post service. show viewers how much the post service made in fiscal year 2017. $69.6 billion. its expenses, though, $72.3 billion with a n

kevin kosar is with the r street institute, public policy vice president there. , ck out rstreet rstreet.org, or on twitter at kevin receive kosar, appreciate the time. on "washington journal," c-span "50 capitals tour" continues. joined by idaho butch otter, stop number 27 of c-span "50 capitals tour," that conversation coming up next. >> tonight on "landmark cases," katz v. united states, where katz, a bookie, was tape recorded by the f.b.i., while bets from a illegal telephone booth on sunset boulevard in los angeles. in supreme court decision this case ultimately expanded americans rights to privacy and the fourth amendment forever changed the way law enforcement officers conduct their investigations. to discuss this case are jeffrey rosen, president and c.e.o. of the national in titution center, philadelphia, and jamil jaffer, national security institute and director of the national security law and policy program. mason george university's antonin scalia law school. tonight ndmark cases" and join the conversation, our hashtag is "landmark cases," and follow