America has had 43 Presidents, with Grover Cleveland having two non consecutive terms in office, being the 22nd and 24th Presidents, therefore making Barack Obama President Number 44.
At the same time, we have had 47 Vice Presidents, with two serving under two Presidents, and a total of nine Presidents who had more than one Vice President while in office.
George Clinton served as the second Vice President under Thomas Jefferson and the first term Vice President under James Madison.
John C. Calhoun served as the Vice President under John Quincy Adams and the first term Vice President under Adams’ successor in the Presidency, Andrew Jackson.
Thomas Jefferson had two Vice Presidents, Aaron Burr and George Clinton.
James Madison had two Vice Presidents, George Clinton and Elbridge Gerry.
Andrew Jackson had two Vice Presidents, John C. Calhoun and Martin Van Buren.
Abraham Lincoln had two Vice Presidents, Hannibal Hamlin and Andrew Johnson.
Ulysses S. Grant had two Vice Presidents, Schuyler Colfax and Henry Wilson.
Grover Cleveland had two Vice Presidents, Thomas A. Hendricks, and Adlai Stevenson I.
William McKinley had two Vice Presidents, Garret Hobart and Theodore Roosevelt.
Franklin D. Roosevelt had three Vice Presidents in his four terms of office—John Nance Garner, Henry A. Wallace, and Harry S. Truman.
Finally, Richard Nixon had two Vice Presidents, Spiro T. Agnew and Gerald R. Ford.