"Bannon’s subpoena, and interview with congressional investigators, comes after the publication of Michael Wolff’s book “Fire and Fury: Inside the Trump White House,” where Bannon made comments blasting President Trump’s eldest son Donald Trump Jr., son-in-law Jared Kushner, and ex-campaign chairman Paul Manafort."
Note the targets of the comment - Trump family and campaign manager. Those close to the President. Mueller is trying to squeeze Trump just like the team members put the aqueeze on Enron and Auther Anderson. Most likely they are just as innocent as the Arther Anderson people and like them, caught in a political squeeze play by dirt bads.