>> we did not come up with a list of who if fbi should interview. >> it was a initial list of four provided to us by the senate. they were interviewed and leads were followed up on. >> as you see there, wolf, you have to senate saying we didn't provide a list of names, the white house saying they received four names, that makes things murkier. the question comes down to what did the white house direct the fbi to do? the fbi is not taking direction from the senate. they're taking it from the white house. not sure we will before the vote nomination but that's the key question the public is asking. what were the parameters? what were the constraints? >> josh campbell reporting. let's get more perspective from a veteran of high profile investigations. joining us, cnn's senior legal