Wonder what would happen if neither Trump nor Clinton gets 270 or more electoral votes? This is possible, though unlikely. Remember there are 2 minor party candidates running.

The quick answer is the US House of Representatives decides the president if this happens. And the Republicans control the House.

link: http://www.marketwatch.com/story/heres-what-happens-if-the-election-doesnt-end-on-tuesday-night-2016-11-03