History
After the 1968 Democratic National Convention, the Democratic Party implemented changes in its delegate selection process, based on the work of the McGovern-Fraser Commission. The purpose of the changes was to make the composition of the convention less subject to control by party leaders and more responsive to the votes cast during the campaign for the nomination.
These comprehensive changes left some Democrats believing that the role of party leaders and elected officials had been unduly diminished, weakening the Democratic ticket. In response, the superdelegate rule was instituted after the 1980 election. Its purpose was to accord a greater role to active politicians.[2]
Superdelegate - Wikipedia, the free encyclopedia