Columbia subject headings:
Executive power--United States--Congresses.
Presidents--United States--Congresses.
United States--Politics and government--Congresses.
Harvard subject headings:
Executive power--United States--Congresses.
Presidents--United States--Congresses
United States--Politics and government--Congresses.
Princeton subject headings:
Executive power--United States--Congresses.
Presidents--United States--Congresses.
United States--Politics and government--Congresses.