The Instrumental Value of One Vote

Over in this Leiter thread, some philosophers seem to be dismissing the instrumental value of voting (for Clinton over Trump) for misguided reasons:

(1) That a marginal vote is "astronomically unlikely to change the outcome."

This is not true,* at least for those who are able to vote in a swing state. According to Gelman, Silver and Edlin (p.325), the chance of a marginal vote altering the election outcome is as high as 1 in 10 million, depending on the state.  Given that the outcome will in turn affect hundreds of millions (or even billions) of people, voting for Clinton in a swing state arguably has significant expected value.

(2) That the system is not sensitive to a single vote, and anything close to even will be decided by the courts or the like.

The claim that insensitivity undermines marginal impact is generally fallacious.