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.
President of the United States
The Constitution, in , stipulates that the vice president takes over the "powers and duties" of the presidency in the event of a president's removal, death, resignation, or inability. Even so, it does not clearly state whether the vice president would become President of the United States or simply act as president in a case of succession. This ambiguity was alleviated in 1967 by , which unequivocally states that the vice president becomes president upon the removal from office, death, or resignation of the president.