precaucus

As a noun terms

is .

As an adjective precaucus is

before a caucus.

As a noun caucus

is a meeting, especially a preliminary meeting, of persons belonging to a party, to nominate candidates for public office, or to select delegates to a nominating convention, or to confer regarding measures of party policy; a political primary meeting.

As a verb caucus

is to meet and participate in caucus.

As an adjective precaucus is

before a caucus.