What I remember of Joe Biden is the way he went after Scott Ritter in the hearings on weapons inspections in Iraq. In the end, Ritter proved to be right.

               This from Wikipedia:

During Ritter's Senate testimony about the inspection process, Senator Joseph Biden stated "The decision of whether or not the country should go to war is slightly above your pay grade." Senator John McCain later rebutted by stating that he "wished that the administration had consulted with somebody of Ritter's pay grade during the Vietnam War."