It's ironic, though...
The Constitution itself shapes the voter pool into two moderate coalitions...
... certain "principled" conservatives are bitter at having to share power with moderates in a coalition...
so they'll vote a fringe-not-moderate third party....
... to UPHOLD the Constitution ;-)
I don't plan on voting a third party. However, if limited government and secure borders have finally become "fringe," then this country is screwed already -- regardless of who wins in November.