It's an Indian war yell or something like that, they used to do it in United Farm Workers rallies, and they adopted it at Dean For America.YEEAAH!!!!
Update from Dave:
Note: I had a phone talk this evening with Jim Moore about the piece above. He says the yelling I heard in the conference room at Dean HQ wasn't an Indian thing, although I remember him saying that, he says he didn't say it. I take him at face-value, and perhaps I embellished it in my memory at some point. Stranger things have happened.
Indian Love Call [ mp3 ] - by Rudolph Friml, Theremin and Piano (3.40 Mb)
The Howard Stern remix [ mp3 ]
I want to be a part of it, "NEW YORK! NEW YORK!"
via [ fark ]