Caucus

"Caucus" means:

1. A meeting of the local members of a political party especially to select delegates to a convention or register preferences for candidates running for office.
2. A closed meeting of party members within a legislative body to decide on questions of policy or leadership.
3. A group within a legislative or decision-making body seeking to represent a specific interest or influence a particular area of policy: a minority caucus.
4. (British) A committee within a political party charged with determining policy.

• Also see: Party caucus

• Sources: http://www.thefreedictionary.com/Party+caucus