What happens if Republican electors vote for a third person, and no one

[Bucky]

19. Romney would be dead in the water, however.

Mitt has no intention of sullying his name with such a move. First, he'd be dead to the Republicans, having depended on mostly Democratic votes to get into office over a guy he's clearly intimidated by--and would fear looking like this was all pique over not being chosen for Sec'y of State.

The Tea Baggers would be up in arms... maybe literally... over the "coup" and some of them would start cozying up to the alt-right, which would include a few actual loons out doing actual acts of violence. Hannity and Scarborough and Limbaugh and O'Reilly would all scream bloody murder for the next four years. The Republicans would not just feel betrayed, they'd see their party torn apart by the coup.

He'd have to preside over four years of chaos. I just don't see him risking all that just save America from a fellow zillionaire.