Twenty-second Amendment to the United States Constitution
The Twenty-second Amendment (Amendment XXII) to the United States Constitution sets a limit on the number of times an individual is eligible for election to the office of President of the United States, and also sets additional eligibility conditions for presidents who succeed to the unexpired terms of their predecessors.
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.