President of Argentina
Under the 1994 constitutional amendment, the President serves for four years, with a possibility of immediate reelection for one more term. However, unlike the President of the United States, in Argentina, a person may be reelected again after serving for two terms and staying out of office for the following term. So after serving for two consecutive periods, the president is not allowed to run for a third consecutive one, but may return for the two following elections and so on. There is no limit for a person to be a candidate if he or she does not win the elections.
List of presidents of the United States by age
Altogether, eleven presidents have held this distinction while in office. In the cases of George Washington, William Howard Taft, Woodrow Wilson, and Ronald Reagan this occurred upon their inauguration as they were older than their living predecessors (or, in Washington's case, had no predecessors). In the cases of John Adams, Ulysses S. Grant, Theodore Roosevelt, Herbert Hoover and Richard Nixon, this happened at the same time as their becoming the only living president; in the cases of Andrew Jackson and Benjamin Harrison, the only other living president at the time was a younger predecessor, John Quincy Adams and Grover Cleveland respectively. By contrast, the president who acquired this distinction furthest from his time in office is Jimmy Carter, who had been retired for .