Mueller does not know what she may know about FusionGPS, Democrats, and the origins of the “Russia narrative” ... which may well involve criminal acts.... so clearly Mueller & co. are not interested in getting the facts out.
Mueller hasn’t asked to see the DNC server that was allegedly “hacked”. You’d think that would be central to the investigation.
They aren’t investigating GPS. They are investigating Trump. That is what the letter appointing Mueller says.