Patraeus knows Obama has to go. Broadwell feels the same way. They thought Obama would lose and that would take care of the problem.
But it didn't.
No problem; they had a plan B.
Plan B was they staged an affair that they never had, and leaked the story to the FBI through a third party who was undergoing a routine background check. The third party believed the story was true, and didn't realize she was being used by Patraeus and Broadwell.
When the third party tells the FBI, the FBI goes to Broadwell to corroborate the story. Broadwell confesses that it is all true. She tells Patraeus that the plan is working.
Patraeus resigns. Obama accepts and the rest of the world is stunned.
Now, Patraeus, as a civilian, can be compelled to testify as to what he knew about Obama's activities during the Benghazi affair.
His testimony is damning! Obama has actually broken the law and lied about it, and Patraeus knew about it all along but could not tell anyone as long as he was employed as Director.
Obama is impeached, disgraced, and removed from office!
(last scene) Patraeus, Mrs Patraeus, Broadwell, and Mr Broadwell are all enjoying a barbeque together. Patraeus has his retirement, and Broadwell's book about Patraeus has become a best seller. None of them will ever have to work again and they have rid America of the worst President in history......And no one ever suspected the truth.