What are the duties of the vice president of the United States?

Question

Besides being Plan B for the Oval Office and breaking ties in Congress votes, what exactly does the vice president do?

Answer 1

He is required to preside over the Senate during the State of the Union Address! And he gets to throw out the first ball of the season if the POTUS lost his throwing arm!

Answer 2

Whatever he and the President agree that he should do.

Answer 3

Some just sit back and wait their turn..

Some like Joe Biden, if elected, will have to run the country.

Answer 4

Duties are at the option of the President.  Some like LBJ and HW Bush basically attended state funerals and were ignored (they were on the ticket solely to get a sector of the vote).  Some like Cheney are given practically whatever he asks for.  It is not a good job but can lead to a Presidency if the President is well received (like Reagan was - got HW his Presidency even though their ideas were not at all similar).  

Answer 5

Nothing.