i don't do this. while it's a romantic ideal to "not believe in lesser-evilism", it doesn't help anyone. someone is going to be elected, with or without your voluntary participation.

so rather than vote (or not) for the "lesser evil", i take the approach to objectively look at the probability of benefit to my own situation, period. don't anthropomorphize politicians (or larry ellison).

adjusting for lying, external factors, etc., maximize for your own objective, concrete, benefit. relative "evil"-ness is not a valid factor. for once being selfish is exactly the right thing to do - if everyone did this, then it would yield the best result for the greatest number of people.

if you feel like being romantic or heroic, then look at it as you are selecting for things that best benefit your "values" (as if that word has anything to do with politics) and therefore automatically benefit like minded other folks (who are obviously the "good" ones then) too.