Maureen Dowd seems to allude to animosity or at least lack of friendship between the Clintons and pretty much all Democratic big wigs including: Al Gore, Nancy Pelosi and Jimmy Carter. These are also the people who may have a big influence on the remaining superdelegates. 
One can only hope she's right...
http://www.nytimes.com/2008/03/23/opinion/23dowd.html