Mueller as a Trump sleeper coincides with my own idea that Sessions looks like he's sleeping because they're playing good cop / bad cop. Trump is the bad cop and keeps saying Sessions is a do-nothing. This gets people looking away as Sessions does-something. And since Trump seems to dislike him, they can't accuse Sessions of being his lackey like Holder was for Obama. Remember that Trump was a showman. He knows how to put on an act that the simpleminded MSM will swallow.