Theses days, electors are committed supporters of the candidates. They may or may not have discretion, but they are not about to exercise it in any interesting way, certainly not to turn the vote for the presidency into a popular vote contest when the whole purpose of the electoral college allocation was to give thinly populated (agrarian) states clout greater than mere capitation would produce.

I can understand how an elector of extraordinary conscience, given the information technology of the late eighteenth century, might decide that he would not be an elector at all if the votes in his state had been accurately counted. But that was then, and this is now. Today, the only purpose served by the electoral college is to weight the votes of farmers over those of city folk. Anything else electors do is just plain wrong.