How many faithless electors so far ?
None. Looks like there may not be any this election.
I think 2016 may have undermined how rare faithless electors are.
Yeah. Before 2016, last faithless elector was 2004, when it was probably an accident (someone voted for Edwards twice).
There was also a faithless Gore voter in 2000 from DC, but that was just in protest of DC's lack of Congressional representation. Before that, last time was in 1988 when a West Virginia elector voted for Bentsen instead of Dukakis to make a point about the potential for faithless electors under the current system.
Notable that neither of those cases involved an elector for the winning candidate and both were gestures of protest; almost certainly they wouldn't have happened if their candidate won and their votes were decisive.
2016 was very unusual for how many electors it had, but even then most would not have happened were it not for unusual circumstances. The Hillary faithless electors consisted of a couple of left-wing protest voters (one for Bernie, one for Faith Spotted Eagle) and a group from Washington who had tried in vain to convince Trump electors to vote for Colin Powell instead as a compromise. That would not have happened had Hillary won. The Trump faithless elector was a guy in Texas who voted for Ron Paul. That one might have happened regardless...
