"[T]he White House, with concurrence by the FBI and Justice Department, held off on asking for Petraeus’ resignation until after the election. His resignation occurred three days after the election, avoiding the possibility that Obama’s ill-fated appointment of Petraeus could become an issue in the election.
FBI agents on the case were aware that such a decision had been made to hold off on forcing him out until after the election and were outraged.
“The decision was made to delay the resignation apparently to avoid potential embarrassment to the president before the election,” an FBI source says. “To leave him in such a sensitive position where he was vulnerable to potential blackmail for months compromised our security and is inexcusable.”