Who elects the president if no candidate wins majority electoral?

Answer 1

If no candidate for President of the United States gets a majority of votes in the Electoral College, then the election will be decided by a vote within the House of Representatives. However, in the House of Representatives, each State gets ONE vote.

So it is at least theoretically possible that in a 3-way election where two candidates have split the urban, coastal, big-state votes, that the #3 candidate who did well in the small population midwestern states might decisively win the election in the House and become the President.

Answer 2

If no one receives a majority of electoral college votes, the House of Representatives decides the outcome. Voting is by state, rather than by delegate, so each state's vote is weighted the same regardless of population. There's no obligation on the part of the delegations to vote in accordance with the statewide popular vote. If no one gets a majority there, then they keep voting until someone does.

If the same thing happens for the vote for Vice-President, then the Vice-President is elected by the Senate.

It's at least theoretically possible that this could result in the President and Vice-President being of different political parties, which is very unlikely to happen in the normal course of events.