Columbia subject headings:
Harvard subject headings:
Elections--United States--History--21st century.
Political campaigns--United States--Case studies.
Presidents--United States--Elections--2016.
United States--Politics and government--2009-2017.
Voting--United States--History--21st century.
Princeton subject headings:
Elections--United States--History--21st century.
Political campaigns--United States--Case studies.
Presidents--United States--Elections--2016.
United States--Politics and government--2009-.
Voting--United States--History--21st century.