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-elect of the United States
The president-elect assumes office as the next president of the United States upon the expiration of the term of the previous officeholder at noon on January 20. This procedure has been the subject of many misinterpretations and urban legends, such as the myth of David Rice Atchison's one-day-long presidency, which is predicated upon false assumptions and a logical flaw. Taking the formal oath of office does not affect the automatic accession to and occupation of the office of the presidency, which, in the case of the president, proceeds, ipso facto, from the expiration of the predecessor's term and the immediate start of the new four-year term. The oath of office is necessary so that the president can "enter upon the execution" of their office, but they are already president from the start of their term.