Why Bannon's defiance of a subpoena to testify in Congress goes hand in hand with insurrection.

Bannon claimed that the wrecker still has the "executive privilege" to forbid Bannon from testifying, even though the wrecker no longer holds an executive office. This could be the basis of an appeal.

It seems pretty obvious to me that ex-officials must not have any power to block testimony about what they did while in office.