The vice president's duties in the Constitution include presiding over the Senate and casting tie-breaking votes, with few other official tasks.
The vice president's sole duties in the Constitution are to preside over the Senate and cast tie-breaking votes, and to be ready to assume the presidency in the event of a vacancy or disability.
Eight of the forty-three presidents had been vice presidents who succeeded a dead president. Otherwise, vice presidents have few official tasks. The first vice president, John Adams, famously stated, 'I am Vice President. In this I am nothing, but I may be everything.'
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