The three spheres or the three faces of political parties are the party in the electorate (the individuals who tend to support a particular party), the party organization (the formal party apparatus), and the party in government (the partisan identification of elected leaders).
The party in the electorate are those members of the voting public who consider themselves to be part of a political party and/or who consistently prefer the candidates of one party over the other.
The party in government constitutes the organized partisans who serve in office, such as members of the Democratic and Republican parties in Congress.
Party organization is the party professionals and members who run the party at all operating levels by contributing time, money, and skill i.e. helping in campaigns, etc.
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