What is one of the identified goals of a party convention?

A key goal of a party convention is to promote party unity. This is essential for ensuring that all members of the party, including various factions and interest groups, come together to support the party's candidates and platform. Conventions serve as a platform where delegates gather to discuss, deliberate, and ultimately endorse the party's nominee for president, solidifying support around that individual. Achieving unity is important because it helps to present a cohesive front to voters, which can enhance the party’s chances in the upcoming elections. This aspect of unifying the party also helps to mitigate any internal conflicts that may have arisen during the primary season.

The concept of establishing a national agenda is certainly a function of party conventions, but it is often secondary to the immediate need for unity among party members. Additionally, the creation of a national holiday is not a goal associated with party conventions, as these events are focused on internal party business rather than legislative initiatives. Lastly, while challenging existing laws can be an aspect of a party's broader platform, it is not a primary goal of the convention itself, which is more centered on candidate selection and nurturing solidarity among party members.