(1) The President of the U.S. is the Commander in Chief of its Army and Navy and of the Militia of the several States. (2) As the head of the Executive Branch, he or she is the main responsible for enforcing the laws created by the Congress. (3) To achieve this, the President is given the power to appoint the heads of the federal agencies, Ambassadors, public Ministers, Consuls, Judges of the Supreme Court, and other Officers. (4) All of this with the Congress' consent. (5) He or she is also able to sign the legislation into law or use his veto power, to conduct diplomacy with other nations and sign treaties.
(6) As for the Vice President, his main responsibility is to take the Presidency in case that the President is unable to perform his duty. (7) The Vice President also plays an important role as the President of the Senate. (8) In such position, he or she determines the deciding vote in the case of a tie, except in the case of tiebreaking votes.