In which form does the Party Organization operate?

The correct answer is that the Party Organization operates through a nationwide organization. This means that political parties are structured not just at the local level but have a significant presence and organization that spans across the entire country.

Party organizations are pivotal for coordinating activities, resources, and strategies throughout various elections nationwide, ensuring a unified approach to campaigning and voter mobilization. They help in establishing a national platform, recruiting candidates, and raising funds, which are crucial for the party's visibility and effectiveness during elections.

Unlike the other options, which either limit the scope of the party organization or misconstrue its role in the electoral process, the nationwide organization reflects the comprehensive structure and function of political parties in the U.S. system.