> If, on the other hand, voter participation goes down noticeably it can drive change. Both parties will know they lost support and, more importantly for them, have voters to win over. It also opens the door for creating a real chance for a third party that doesn't exist when we all continue to accept the unofficial duopoly that started way back when Hamilton and Jefferson were tearing the union in two.

Is there a minimum turnout needed? I'm pretty sure there isn't. All the diehards will always vote for the Dems or Reps. And everyone else is not voting, not voting for an alternate candidate.

Sounds like the fewer swing voters there are, the better.