Columbia subject headings:
Obama, Barack.
Political leadership--United States.
Political science.
United States--Politics and government--2009-2017.
Harvard subject headings:
Obama, Barack--Political and social views.
Political leadership--United States
Political science
United States--Politics and government--2009-2017.
Princeton subject headings:
Obama, Barack.
Political leadership--United States.
Political science.
United States--Politics and government--2009-.