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.
Constitution of Russia
The Constitution of the Russian Federation specifies that the President is the Russian head of state, setting domestic and foreign policy and representing Russian both within the country and internationally [Article 80]. While the original constitution stipulated a four-year term and a maximum of two terms in succession, the current constitution decrees a six-year term. The four-year term was in effect while Vladimir Putin served his first and second terms; with the two-term limit he was barred from the presidency in 2008. Instead, he served as Prime Minister while Dmitry Medvedev served as president for four years. Putin was re-elected to his third term in 2012; with the six-year term, he was elected to his fourth term in 2018. Article 81 specifies the method of election, including a secret ballot; Articles 82 - 93 detail powers, responsibilities, and limitations of the presidency. The constitution provides for a 'strong presidency'; not only is the president the "Supreme Commander-in-Chief of the Armed Forces of the Russian Federation", the president also has the power to dissolve the State Duma.