Columbia subject headings:
Trump, Donald, 1946-
United States--Politics and government--2017-2021.
United States. Congress--Elections, 2018.
Harvard subject headings:
Elections--United States--History--21st century--Case studies.
Political campaigns--United States--History--21st century--Case studies.
United States--Politics and government--2017-2021
United States. Congress--Elections, 2018.
Princeton subject headings:
Trump, Donald, 1946-
United States--Politics and government--2017-.
United States. Congress--Elections, 2018.