Former Trump National Security Adviser John Bolton fought a House subpoena to give testimony for President Trump’s impeachment.  The stories he didn’t tell he did sell -- for a $2 million book advance.  Bolton’s book was published despite a White House suit to stop it.  So what?  National Security correspondent Shane Harris of the Washington Post on what parts of Bolton’s accusations matter and why… and how one of them may explain why Trump or Attorney General Barr fired the US Atty for the Southern District of NY.