Answer:
Party Convention also known as Political Convention.
Step-by-step explanation:
The formal purpose of this convention is to select the party's nominee for President, as well as to adopt a statement of party principles and goals known as the platform and adopt the rules for the party 's activities, including the presidential nominating process for the next election cycle. Before the development of conventions in the United States in the 1830s, American political parties selected candidates and policies in informal caucuses of the parties’ congressional delegations.