CIA Director David Patreaus Resigned?

Just days before his appearance before Congress to testify about the Benghazi scandal, General David Patraeus resigned. In his resignation letter to President Barrack Hussein Obama, Gen Patraeus revealed that infidelity made him unfit for the job. But the timing is extremely suspicious according to reports. Some now asking, whether its really infidelity", or is he, again, thrown under the bus by the Democrat party who, with their supporters, called him "General Betray-us" when he served the military under President Bush? His resignation doesn't protect him from congressional subpoena power and it is a matter of time before the truth about Benghazi, the General's role in the scandal, and whether he was forced to leave, come out.  
All I can say is that this man served the US Armed forces honorably under two presidents. He is credited for turning around Iraqi and help drive the insurgents back out of most of the cities in Baghdad by forging strong alliance with tribal elders. He will be honored regardless of his infidelity.