<P> The Vice President of the United States is the ex officio President of the United States Senate, as provided in Article I, Section 3, Clause 4 of the United States Constitution: </P> <Table> <Tr> <Td> "</Td> <Td> The Vice President of the United States shall be President of the Senate, but shall have no Vote, unless they be equally divided . </Td> <Td>" </Td> </Tr> </Table> <Tr> <Td> "</Td> <Td> The Vice President of the United States shall be President of the Senate, but shall have no Vote, unless they be equally divided . </Td> <Td>" </Td> </Tr> <P> According to the U.S. Senate, as of March 30, 2017, the tie - breaking vote (or casting vote) had been made 258 times by 36 different Vice Presidents . </P>

Who has the tie breaking vote in senate