A lot of what folks call holding on the their principles is really nothing more than egotistical self-righteousness. Let me explain.
So often in life the choice comes down to the lesser of two evils, a third choice may make one feel good, but one always has the moral obligation to vote for the lesser of the two evils that has a chance of coming to fruition.
Let’s say in 1933 you knew the Nazi party was hands down the worst party but you really didn’t care all that much for the only other party that had a chance to defeat it, so you voted for some inconsequential third party and felt good about yourself, until that is you saw picture of the Nazi death camps that by wasting you feel good vote you helped bring into existence.
A lot of Americans are going to vote for Trump as a protest vote because it makes them feel good. But if there was ever a personal phycological profile that screamed wannabe ruthless dictator, it is the Donald. So even if you hate Hillary, vote for the lesser of two evils. Vote for the lady. It is your moral obligation.