coming to a close. i think there is two possible, maybe more. one is to say you interview the pl at the end of an investigation. think of the obstruction investigation as a relatively discreet part of the muller investigation. we know he interviewed comey and jeff sessions that were other principals in these interactions and he wants to interview the president that the mueller investigation it wrapping up. the order way to look at it is that this is a mess of a investigation, and sometimes you do the interviews in the middle of things, get people on the record and see what opens up. >> is there possible that there are three or four separate sub parts of the investigation.