While historical analogies are always imperfect, this debate gave me the eerie feeling we were watching 1860 revisited.  Just as the South refused to accept the electoral defeat of the  Breckenridge - Lane ticket leading to Secession, tonight  we heard  Mr. Trump refusing to acknowledge that he would support the results of the upcoming election.

He says he won't accept the results if the election is "rigged", then gave two examples   supposedly  showing it is already "rigged:" 
First, that the "media" are totally unfair and treat him so badly, and second, that Hilary Clinton, with all her horrible behavior shouldn't even be allowed to run at all.

We all need to take his threat seriously as it seems he's already prejudged the outcome as "rigged".  His backers need to ask if they want a repeat of the worst violence in American history.  Even Old Joe Lane, upon years of reflection, had to admit he'd been wrong in his radical and thoughtless youth.
Lets' not repeat such foolishness.