cooperating with the special counsel. it's true we don't know exactly what mueller's interest in george nader is but again, whatever it is he's providing, it is evidence in this kasz that is now before a grand jury. >> interesting. shimon, thank you. joining me is cnn legal and national security analyst and former fbi special agent, how significant is it that george nader is cooperating with the special counsel? >> to me brianna, this is significant because it's showing that mueller is really expanding the scope of his investigation. it's looking internationally that there were potentially even more contacts and connections we now have the uae involved in addition to russia and looking at how all of these things tie together with the trump campaign. so mueller's investigation is not ending any time soon. i can tell you that. >> i want to ask you about the