Columbia subject headings:
Harvard subject headings:
Obama, Barack
Presidents--United States--Biography
Princeton subject headings:
African American legislators--Biography.
Legislators--United States--Biography.
Obama, Barack.
Political campaigns--United States--History--21st century.
Presidents--United States--Biography.
Presidents--United States--Election--2008.
Racially mixed people--United States--Biography.
United States--Politics and government--2001-2009.
United States. Congress. Senate--Biography.