What is a caucus?

[koxka]

Acording to the inbuild Dictionary and Thesaurus on my Mac:

caucus |ˈkôkəs|
noun ( pl. -cuses )
1 a meeting of the members of a legislative body who are members of a particular political party, to select candidates or decide policy.
• the members of such a body.
2 a group of people with shared concerns within a political party or larger organization.
• a meeting of such a group.
verb ( -cused, -cusing) [ intrans. ]
hold or form such a group or meeting.
ORIGIN mid 18th cent.(originally U.S.): perhaps from Algonquian cau'-cau'-as'u ‘adviser.’

-Thesaurus
caucus
noun
1 the conservative caucus members, party, faction, camp, bloc, group, set, band, ring, cabal, coterie, pressure group.
2 caucuses will be held in eleven states meeting, assembly, gathering, congress, conference, convention, rally, convocation.

But it so remain me the word *cacao* (cocoa) that we, catalan not sure about in spanish, people use to express in an informal language chaos, like *¡Quin cacao! (what a chaos!) LOL

By the way which candidate used that word?