"Refusing to elect Trump"
Well first of all enough electors in the electoral collect changing their votes to refuse to elect Trump would be totally unprecedented. But for those outside the US who may not be aware, unless enough of them switched to Hillary to elect her (which they probably wouldn't) the lack of anyone getting a majority would send the election to the House of Representatives.
The republican majority would be free to elect ANYONE, but likely would vote in Trump citing "will of the people" and due to fear that Trump voters would vote them out in 2018 if they went against him. But there would be a lot of drama, and possibly room for a compromise between democrats who don't want to see Trump and republicans from districts where they don't have to be afraid of the Trump voters electing a third candidate, like Paul Ryan.
But I doubt they could get enough democrats on board for such a thing - they'd need pretty much all of them, and there are enough of them who would stubbornly vote for Hillary knowing she couldn't win and knowing that it would mean they'd get Trump. Though that might not be a bad idea, since they'd have to like their odds of beating Trump in 2020 a lot more than the odds of beating Ryan.
Biting the hand that feeds IT
