What will it take for a non Rep/Dem to become POTUS?

sorry for the total breakdown of coding. sigh

Zagadka:

But a politician can take on a position that combines what to a significant demographic is the most attractive elements of each. Like someone who’s both pro-gun-control and anti-abortion, or something like that. How many people are single-issue voters who might vote for a third party if their preferred stance on the key issue is combined with stances they prefer on secondary issues?