George Washington
At the end of his second term, Washington retired for personal and political reasons, fatigued and disgusted with personal attacks, and to assure a truly contested presidential election could be held. He did not feel bound to a two-term limit, but his retirement ultimately set precedent. The two-term limit to the presidency was formalized with the 1951 adoption of the Twenty-second Amendment to the United States Constitution. Washington is often credited with setting the principal of a two-term presidency, but it was Thomas Jefferson who first refused to run for a third term on political grounds.
Macky Sall
In January 2016, Sall supported proposed constitutional reforms that would limit any president to two consecutive terms in office, and reduce the term of office from seven years to five, in accordance with his promise at the 2012 election. The Constitutional Council refused to allow Sall to shorten his own term of office, but allowed the other changes to be put to a referendum, to the dismay of some of Sall's former supporters. Protests and violent clashes preceded the referendum, which passed on 20 March 2016 with 63% in favour and turnout slightly in excess of 40%.