laser, if the guy you're voting for will give up on what he believes in (which is identical to what he presents as his "plan", otherwise he's a crook) just because the votes don't come in, he's not worth voting for.
If your vote goes to someone who does not win, your vote is in vain. If in addition to that, it allows the worse worse/worst (this qualitative relative to you) candidate to get in, then not only was your vote to elect someone who lost in vain, but you also made it easier for said worse/worst candidate to -guess what- further his efforts against what you stand for.
You've effectively elected the opposite of who you voted for, something else than "what you believe in". Correct me if I'm wrong, but from what you say so far, you have zero tolerance for anything else than what you believe in.. so why would you do the above?
Skuzzy's idea of a forum (in the litteral sense) where candidates present their "plan" in text; that is, set their words in stone, is still the best idea.
No one will deny a truth once it's understood.. Candidates would have nowhere to go but towards the truth, should they fight in this text/idea-based medium.. it would shift the survival of the fittest type of fight you find being fought with money, nowadays, shifted back to where it belongs: IDEA.
Skuzzy's idea would allow candidates to fight on this even ground, no amount of money would matter, only the truth, only common sense.. no BS.
It would also allow people with short memory to keep track of how much any candidate's word is worth.