Columbia subject headings:
Control (Psychology)--Political aspects--United States--Congresses.
Executive power--United States--Congresses.
Obama, Barack.
Presidents--United States--Congresses.
United States--Politics and government--2009-2017.
Harvard subject headings:
Control (Psychology)--Political aspects--United States--Congresses.
Executive power--United States--Congresses.
Obama, Barack--Congresses.
Presidents--United States--Congresses
United States--Politics and government--2009-2017--Congresses.
Princeton subject headings: