Washington (CNN) In politics, there's a tendency to assume that what is publicly known is everything there is to know. Twitter, cable TV and lots and lots of ambitious politicians ensure that no strategy gets left unexplored, no thought gets left unvoiced. But that frame fails when it comes to understanding what exactly special counsel Robert Mueller is doing in regard to the investigation. Mueller and his team are the rarest of rare commodities in modern Washington -- a closed universe without leaks. We didn't even know Sessions was under any sort of investigation -- much less that he may have been cleared!

Source: CNN March 21, 2018 23:26 UTC