whether Democrat or third party, would keep a close watch on the polls, and make a decision to back out if it becomes obvious they will end up handing the election to the Republican. (I can understand staying in if the polls don't seem to suggest they will make the difference.) I strongly salute the Dem who dropped out of such a three way race recently, for actually doing what he thought made it more likely that a non-Republican would win, even if it meant he himself would not be that person.

(And yes, I know that everyone who is eligible to run has a right to do so. I just would hope that they might be willing to think a bit more strategically.)