Columbia subject headings:
Caucus.
Nominations for office.
Political conventions--United States.
Political conventions.
Primaries--United States.
Primaries.
Referendum.
Harvard subject headings:
Nominations for office.
Political conventions--United States
Primaries--United States.
Primaries.
Referendum.
Princeton subject headings:
Nominations for office.
Political conventions--United States.
Primaries--United States.
Primaries.
Referendum.