"A History of 'Super-Delegates' in the Democratic Party"
http://belfercenter.ksg.harvard.edu/publication/18072/history_of_superdelegates_in_the_democratic_party.html"Opposition to this proposal came from supporters of Senator Edward Kennedy (who, at the time was expected to make another run for the presidency) and from organized feminists. Kennedy supporters on the Commission feared that a large number of Senators and Congressmen at the convention could stop him. On the other hand, former Vice President Walter Mondale, felt certain that a large number of these delegates would favor him and his operatives, therefore, embraced the 30% number.
Organized feminists, on and off the Commission, however, make a new argument. Speaking on their behalf, Technical Advisory Committee Member Susan Estrich of Massachusetts argued that creating a new category of delegates who were not subject to the fair reflection and candidate right of approval rules would create a new status of delegate which she referred to as “super-delegates.” These delegates, argued Estrich, would be overwhelmingly white and male. Even were they balanced by an equal number of women in the total delegation — there would still be the problem of “equal power.” The “super-delegates” because of their greater flexibility in the choice of a nominee, would have greater power than the female delegates committed to presidential candidates. (“Unintended Consequences,” by Susan Estrich, Memorandum to the Hunt Commission, September 9, 1981.)
The issue was finally resolved through a compromise created by Congresswoman Geraldine Ferraro. The Ferraro Proposal reduced the total number of un-pledged delegates to 566 or 14% of the Convention, but it left selection of the Congressional delegates in the hands of the House and Senate Democratic Caucuses. (See, Bringing Back the Parties, by David Price, Congressional Quarterly Press, 1984) The 14% number was far short of the original proposal that 30% of the convention be unpledged. However, if the number had been much larger, it would have been practically impossible to meet the equal division between men and women requirements in the rules.
Super-delegates today, in 2008, are no longer elected by congressional caucus. There have been some additions over the years and thus the total number of super delegates as a proportion of the convention has increased by about 5%.