A national parties can refuse to seat delegates selected by refusing organize a presidential nominating convention.
The event of a presidential nominating conventions holds under a partu during the national convention.
The national convention means the meeting of party delegates elected in state primaries, caucuses or conventions that is held every four years.
The primary purpose of every national convention is to nominate presidential and vice presidential candidates and to ratify a campaign platform.
For instance, the parties in United states holds its national convention every four years to determine the presidential candidates for the election that year.
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