Twenty-second Amendment to the United States Constitution
The amendment prohibits any individual who has been elected president twice from being elected again. Under the amendment, an individual who fills an unexpired presidential term lasting greater than two years is also prohibited from winning election as president more than once. Scholars debate whether the amendment prohibits affected individuals from succeeding to the presidency under any circumstances or whether it only applies to presidential elections.
2009 Bolivian general election
Under the new constitution, all previous terms will not be considered for term limits. If any candidate fails to win over 50% of the vote and another candidate is within 10%, a second round will be held. It was the first time that an incumbent President will run for reelection.