And why exactly is he still walking around ?
Brennon, like Clapper, and Hillary, and Podesta, and Comey, and Susan Rice, and Rosenstein, and Lisa Page, and Peter Strzok, and .....
And especially Obama himself.
A guilty person is going to try to manipulate the evidence and they think Mueller and their buddies are going to be successful.
Trump would be laughing at them if this was not so serious. Trump lets them keep making the rope longer and longer. It's too early to stop it, let the RATS hang themselves as they make it worse and worse.