For what Mueller is running here is not, as Trump suggests, a “witch hunt.” It is a Trump hunt. After 18 months investigating Trumpian “collusion” with Putin’s Russia in hacking the DNC’s and John Podesta’s emails, the FBI has hit a stone wall. Failing to get Trump for collusion, the fallback position is to charge him with obstruction of justice. As a good prosecutor can get a grand jury to indict a ham sandwich, the tactic is understandable.
http://buchanan.org/blog/trump-hunt-beware-perjury-trap-128607