Jen, Biden’s comments about AIPAC, as you say, were in keeping with his peevish and often bullying personality. They reminded me of the anecdote which forms the opening two paragraphs of Michael Crowley’s New Republic profile of Biden — published in October, 2001.

It’s a bright early October morning on Capitol Hill. Joe Biden is bounding up the steps of the Russell Senate Office Building, wearing his trademark grin. As he makes for the door, he is met by a group of airline pilots and flight attendants looking vaguely heroic in their navy-blue uniforms and wing-shaped pins. A blandly handsome man in a pilot’s cap steps forward and asks Biden to help pass emergency benefits for laid-off airline workers. Biden nods as the men and women cluster around him with fawning smiles. Then he speaks. “I hope you will support my work on Amtrak as much as I have supported you,” he begins. (Biden rides Amtrak to work every day and is obsessed with the railroad.) “If not, I will screw you badly.”

A dozen faces fall in unison as Biden lectures on. “You’ve not been good to me. You’re also damn selfish. You better listen to me…” It goes on like this for a couple of minutes. Strangely, Biden keeps grinning–even fraternally slapping the stunned man’s shoulder a couple of times. When we finally head into the building, Biden’s communications director, Norm Kurz, turns to me. “What you just witnessed is classic Senator Biden.”

Obviously, this is far worse than anything Biden said about AIPAC. But it’s all a product of the same temperament.