Why would he do that?
Petraeus was a threat to Obama, and so he had him destroyed. Sadly, Petraeus was weak enough to get caught up in a honey pot.
Petraeus was an Obama groupie. His wife was a hard core democrat. His favorite girl in Tampa is a big dem buddy of Kerry and Obama. And Petraeus favorite operational environment was east coast liberal universties.
He’s no threat to Obama, he’s on Obamas team.