Political culture--History--United States--21st century Political culture--History--Germany--21st century Political participation--History--United States--21st century USA Gesellschaft Obama, Barack Europa Politische Kultur Obama, Barack--Popularität--Krankenversicherung--Steuerpolitik--Soziale Gerechtigkeit--Energiepolitik--Wahlsystem--Terroranschlag New York/Washington (2001-09-11)
United States--Politics and government--21st century