Twenty-second Amendment to the United States Constitution
Some argue that the 22nd Amendment and 12th Amendment bar any two-term president from later serving as vice president as well as from succeeding to the presidency from any point in the presidential line of succession. Others contend that the original intent of the 12th Amendment concerns qualification for "service" (age, residence, and citizenship), while the 22nd Amendment, concerns qualifications for "election", and thus (strictly applying the text) a former two-term president is still eligible to "serve" as vice president (neither amendment restricts the number of times an individual can be elected to the vice presidency), and then succeed to the presidency to serve out the balance of the term (though prohibited from running for election to an additional term).
2018 Mexican general election
The incumbent president Enrique Peña Nieto was not constitutionally eligible for a second term. Incumbent members of the legislature are term-limited, thus all members of Congress will be newly elected. As a consequence of the political reform of 2014, the members of the legislature elected in this election will be the first allowed to run for reelection in subsequent elections. The National Electoral Institute (INE) officially declared the new process underway on 8 September 2017.