Jerome Corsi is the new "kingpin" in the Mueller witch hunt. They're trying to link him as a go-between between Roger Stone and Julian Assange, which is supposed to link to something else, and something else, and eventually Trump. What they originally accused Corsi of - knowing about WikiLeaks and Hillary Clinton's emails - isn't against the law anyway. Corsi is an author who writes sensational conspiracy books. He has never been a part of the Trump administration or campaign.
It will amount to exactly nothing, then someone else will become the new kingpin. Every day there's a new "bombshell" that's supposed to be the nail in Trump's coffin....and it turns out to be nothing. At this point Mueller is just shotgunning it in hopes of hitting something.