Once the first ballot, or vote, has occurred, if no candidate has a majority of the delegates' votes, the convention is then considered brokered. ... It is hoped that the extra privilege extended to the delegates will result in a revote that yields a clear majority of delegates for one candidate.

What is the purpose of having a convention before an election?

The formal purpose of such a convention is to select the party's nominee for popular election as President, as well as to adopt a statement of party principles and goals known as the party platform and adopt the rules for the party's activities, including the presidential nominating process for the next election cycle.

What is the purpose of a superdelegate?

In American politics, a superdelegate is an unpledged delegate to the Democratic National Convention who is seated automatically and chooses for themselves for whom they vote.