This is a matter of opinion. In my view, the leading contenders are: to be commander in chief of the military; and, to promote the general welfare.
The President has many duties to carry out. The main duty is to serve and protect The United Sates of America.
to carry out laws that have been passed
to carry out laws that have been passed
what is the lords main duty to the pledged
The main duty of congress is to pass laws
what is the lords main duty to the pledged loyalty to him
The president's main job is to carry out the laws that are passed during his/her term in office.
cabinet
His main duty was to come and fight alongside his king whenever the king needed him for battle.
American Presidents main job is to protect America
The Congress' main duty is to make and pass laws.
became presidents