If the election is between Clinton and McCain the problem with not voting is the supreme court vacancies that will open up. Ginberg and Stevens will leave and as much as I dislike McCain, I’d rather he choose their replacements. Even if they amount to two Anthony Kennedy’s it’s preferable to two Ginsbergs. In fact there are numerous spots throughout the federal judiciary in which McCain appointments are preferable.
The GOP may suffer for a few years as a result of McCain but America has a short memory. Those judicial appointments, though, will last decades.
Based on his record, the evidence suggest McCain would make his Judicial Appointments based on “Bi Partisan” appeal rather then ideological soundness. After all, that was the whole point of his Gang of 14 maneuver.
So with McCain we are likely to get another Souter or O'Conner or Stevens. Leftist Justices appointed by a GOP President.