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.
George H. W. Bush
On November 25, 2017, Bush became the longest-lived U.S. president when he surpassed the 93 years and 165 days lifespan of Gerald Ford, who died in December 2006. Upon Ford's death Bush had become both the nation's oldest living president as well as the oldest living vice president; on June 12, 2018 he became the first U.S. president to reach the age of 94.