Undisclosed email chain between Hillary and Petraeus before she served as Secretary of State. Doubtful it was his invitation to have an affair. More like neocon chums plotting their next nasty moves.
http://www.upi.com/Top_News/US/2015/09/25/Pentagon-has-new-undisclosed-email-chain-between-Clinton-Petraeus/6861443224174/