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.
Twelfth Amendment to the United States Constitution
The experiences of the 1796 and 1800 presidential elections spurred legislators to amend the presidential election process, requiring each member of the Electoral College to cast one electoral vote for president and one electoral vote for vice president. Under the new rules, a contingent election is still held by the House of Representatives if no candidate wins a presidential electoral vote from a majority of the electors, but there is no longer any possibility of multiple candidates winning presidential electoral votes from a majority of electors. The Twelfth Amendment also contained other provisions, lowering the number of candidates eligible to be selected by the House in a presidential contingent election from five to three, establishing that the Senate would hold a contingent election for vice president if no candidate won a majority of the vice presidential electoral vote, and providing that no individual constitutionally ineligible to the office of president would be eligible to serve as vice president.