The consists of the political party leaders who direct party business during the four years between the national party conventions, organize the next national convention, and plan how to support the party’s candidate in the next presidential election

National party committee

Explanation:

 The national party committee is one of the type of federal government organization and it is basically responsible for managing the operations and all activities of the members at the national level.

 According to the given question, the national party committee is basically consist of the political party who directly deals with the business and also organizing the new level national convention.

In the presidential election they makes a plan for supporting the candidates of the party they plays an important role in this type of presidential election.

Therefore, National party committee is the correct answer.

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