Bullies need to have somebody stand up to them
Jay Cost of The Weekly Standard suggests that standing up to this particular bully isn't as hopeless as so many people say, especially given the unprecedented unpopularity of both candidates.
And I can see a third party or independent candidate with sufficient gravitas- Mitt Romney comes to mind- doing what Abe Lincoln did in 1860 and Teddy Roosevelt very nearly did in 1912. This is the year for breaking rules. Maybe it's also a year for facing down bullies.