That's the problem. We need someone with access to the document, a motive to leak said document, and an opportunity to either leak it to the Los Angeles Times or to provide the document to someone who would leak it to said news outlet.
The person with the highest potential for access is Carl Levin of Michigan. He chairs Armed Services in addition to serving on the Intelligence Committee. Problem is, Bush is doing well in Michigan, of all aplaces, so it wouldn't help Levin to leak it in an election year - especially when he is up for re-election.
The person with the motive to see this document leaked is Daschle, and he might have access. But where is the opportunity?
Feinstein has access due to her position on the Intelligence Committee, and opportunity, being from California, and someone who would normally be seen talking to a reporter from the L.A. Times, but I don't see her as having the motive.
It's going to be hard to figure out, IMHO. But we should, and until it is figured out, Congress doesn't get directions to the crapper from ANYONE in DOD.