National conventions are large gatherings held by political parties in the United States to nominate their candidates for the presidency. These events typically occur in the summer before the general election and involve delegates from each state who vote to select their party's nominee. The conventions also serve as a platform to showcase party values and policies. During national conventions, party members participate in speeches, rallies, and discussions to energize supporters and unify the party. The event often features prominent figures, including current and former politicians, who address the audience. The outcome of the convention can significantly influence the party's campaign leading up to the election.