The Lesser of Two Evils

If someone, say, in Denver (Democrat territory) votes for a Republican, have they "wasted their vote"? That can't be our definition -- voting for someone who has no chance of winning -- or a republic instead becomes a tyranny of the majority. We waste our vote anytime we vote for someone who believes things that we know to be unconscionable, simply because "the other guy" is more unconscionable. The lesser of two evils is still evil.