caucus

Short definition from Wiktionary

Noun

1. 1
   A usually preliminary meeting of party members to nominate candidates for public office or delegates to be sent to a nominating convention, or to confer regarding policy.
2. 2
   A grouping of all the members of a legislature from the same party.
3. 3
   A political interest group by members of a legislative body.

Verb

1. 1
   To meet and participate in a caucus.
2. 2
   To confer.
3. 3
   To bring into or treat in a caucus.