Here's what it would take for Elon Musk to launch a third-party effort to represent what he called "the 80% in the middle."

Elon Musk wants to build a new political party to challenge's America's two-party system. But it won't be easy, even for the world's richest man.

Musk said he wants to form the America Party. A third party has never won the presidency, but they have influenced elections, experts say — mostly as spoilers.