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.
United States House of Representatives
Under the Twelfth Amendment, the House has the power to elect the President if no presidential candidate receives a majority of votes in the Electoral College. The Twelfth Amendment requires the House to choose from the three candidates with the highest numbers of electoral votes. The Constitution provides that "the votes shall be taken by states, the representation from each state having one vote." It is rare for no presidential candidate to receive a majority of electoral votes. In the history of the United States, the House has only had to choose a President twice. In 1800, which was before the adoption of the Twelfth Amendment, it elected Thomas Jefferson over Aaron Burr. In 1824, it elected John Quincy Adams over Andrew Jackson and William H. Crawford. (If no vice-presidential candidate receives a majority of the electoral votes, the Senate elects the Vice President from the two candidates with the highest numbers of electoral votes.)