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).
Recep Tayyip Erdoğan
After the opposition parties deadlocked the 2007 presidential election by boycotting the parliament, the ruling AKP proposed a constitutional reform package. The reform package was first vetoed by president Sezer. Then he applied to the Turkish constitutional court about the reform package, because the president is unable to veto amendments for the second time. The Turkish constitutional court did not find any problems in the packet and 68.95% of the voters supported the constitutional changes.
The reforms consisted of: electing the president by popular vote instead of by parliament, reducing the presidential term from seven years to five, allowing the president to stand for re-election for a second term, holding general elections every four years instead of five and reducing the quorum of lawmakers needed for parliamentary decisions from 367 to 184.