Final answer:
Super-delegates are party members who have the power to vote for a candidate at the party's national convention, regardless of primary or caucus results. Their existence gives party leadership greater control over nominations.
Step-by-step explanation:
Super-delegates are individuals who are not elected by voters, but rather have a role in the political party, such as current or former elected officials, party leaders, or prominent members. They are usually granted automatic delegate status and have the power to vote for the candidate of their choice at the party's national convention. This gives the party leadership greater control of nominations because super-delegates are not bound by the results of primary or caucus elections and can support a candidate regardless of popular support. Their influence can play a significant role in determining the party's nominee.