So what are the implications for the present presidential cycle? Vote for the candidate you wish to see elected, as if he or she will be elected. That includes third party candidates — don't vote for them as a symbolic act, but as if they will be president. It also means withhold your vote if you don't want to see any of the candidates elected. (I have supported all elections having a "none of the above" option so as accurately to gauge electoral discontent — mere abstention is a nullity, and one cannot distinguish between dissatisfaction or nihilism. This approach also allows for voting for "the lesser of two evils" in a pragmatic sense — not as a protest vote but a conscious choice of between two or more imperfect options with a view to choosing the least damaging.
But don't vote to "send a message" or to "show support" for a lost cause you would not want to see in power.
Tobias Stanislas Haller BSG