ImNotARacistWho cares? Voting isn't about picking who you think is goin to win. That's the problem with you people. Optimism is knowing she won't win but deciding that presenting progressive ideas is more beneficial than just bitching about everything.
Actually, voting is all about producing outcomes- at the end of the day it is a practical exercise because votes lead to laws and laws lead to a real society that affects real people, either for good or for bad. We need to vote correctly, or for the right person(s), so that the right laws get made and we have a properly functioning society.
If your goal is the promotion of justice and the end of injustice, then voting for someone who has no chance of winning (i.e. your candidate is purely optimistic and not realistic) actually places more of a real chance that the opposition wins. In other words, you've played a direct role in increasing the amount of injustice in the world. In voting for a purely ideal candidate, you've actually contributed to the country being further away from justice.
With Trump standing a strong chance at becoming POTUS, we should (first) be working to keep him out of power and then (second) work to refine and improve the situation (i.e. getting someone better than Hillary in power in 2020). If Trump were to win, the country (and potentially world) would be in a far worse state than if Hillary were to win. Until Jill starts polling at decent percentages and is actually on the ballot in all 50 states, then a vote for her is meaningless, worthless, and quite frankly immoral.