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.
Leonard Peltier
Peltier was the candidate for the Peace and Freedom Party in the 2004 election for President of the United States. While numerous states have laws that prohibit prison inmates convicted of felonies from voting (Maine and Vermont are exceptions), the United States Constitution has no prohibition against felons being elected to federal offices, including President. The Peace and Freedom Party secured ballot status for Peltier only in California, where his presidential candidacy received 27,607 votes, approximately 0.2% of the vote in that state.