Robert Satiacum had long pledged not to vote for Hillary (even before the election). Chiafalo had said tentatively that he would consider doing the same thing,

Robert Satiacum had long pledged not to vote for Hillary (even before the election). Chiafalo had said tentatively that he would consider doing the same thing, but then the election happened, and he had a public tantrum and suddenly decided he would get electors to switch to Clinton. Then his plot failed and he tried something else. Since our next President had already clinched the votes, the other electors decided to make a statement.