appoint federal officials
commander-in-chief of the armed forces
grant pardons
issue executive orders
negotiate treaties
receive ambassadors
veto legislation
convene and adjourn Congress
deliver State of the Union address
ensure laws are faithfully executed
I do solemnly swear (or affirm) that I will faithfully execute the Office of President of the United States, and will to the best of my ability, preserve, protect and defend the Constitution of the United States.