The Vice President of the United States serves as President of the Senate and may break tie votes in the Senate.
The Vice President also becomes the new President if the President dies, resigns, or is removed from office.
Those are his only duties under the Constitution, but it has
become customary for the president to ask the vice-president to
take on special assignments on behalf of the President or to
represent the President at special events.
Under the Constitution, the Vice president has only two responsibilities:
- Become President if the President dies in office, and
- Serve as President of the US Senate.