One could ague that voting for the lesser of evils is nothing more than simple manipulation. The ruling class makes sure there are just two viable political parties, then it recruits a really creepy person from each party to run for a particular office. Voters therefore have no choice to choose one of two creeps...unless they choose to a) vote for some alternative candidate who has no chance of winning or b) not vote at all.
But it could also be argued that people too easily fall into a mental trap in which they're so fixated on twin evils that they fail to see the bigger picture. Rather than try to reform Party A or B or create a new party (or topple the government in a revolution), they just continue voting for garbage.
Can anyone put a name on this? In other words, does this type of manipulation prey on a particular cognitive bias?
If we put it into a question format...
If you don't vote for Candidate B, then you're automatically supporting Candidate A.
If you don't vote for either A or B, then you aren't a good citizen. You must vote, even if there's nothing to vote for!
...what fallacy is being invoked?
In fact, the two questions I asked above are different and probably merit separate questions. But, for now, I'd like to search for some kind of "ballpark fallacy" that relates to what I sometimes call Lesser-of-Evils Syndrome.