Choosing "The Lesser Of Two Evils"
From Captain Ed--why feeling that voting in November's election is futile and therefore justifies staying home is an abdication of responsibility:
Usually, voters are given the choice of the greater of two mediocrities. People face that choice quite frequently in life, and it doesn't absolve them from action. With a given financial situation and set of priorities, people don't simply refuse to buy a car just because they can't afford a Maserati. I bought my last suit from JC Penney because it was well made for the price range I could afford; I don't go naked because I can't afford Armani. Responsible people research their available choices and select from the limited choices they have.
Declaring all choices as "evil" provides false justification for abdication of that responsibility. In this case, once the primaries have determined the candidates for office, voters are presented with two candidates (in most cases) with realistic chances for victory. They rarely turn out to be philosophical or policy twins and/or uninspired candidates, but if that happens, the parties they represent have real differences, and the choice made in this one race will impact the ability of both to push their national agenda. When voters of either party refuse to vote, the absence of the vote has a negative impact on that national agenda.