Dan, how do want to be remembered? It's simple, if Hickenlooper wins you will be not be remembered well, regardless of all the rhetoric one way or the other.
You've given a big part of your life to this campaign and you are a good person, but the reality is that you have no chance of winning. The Republican party does not own you, but most importantly does not want Hickenllper to win. That's the delima with only you as the person who can make a real difference.
If you do the noble thing, in your own self interest, please drop out of the race and support Tom. In this way you will be remembered honorably, if not a hero, otherwise you will hardly be remembered at all and then only in a very negative way. It's that simple, and it's your choice.
Spoken as a friend who really appreciates your time and emotional commitment.