I'm guessing there's a strong chance that he refuses to concede even if he loses decisively. Or maybe he'll concede, but then un-concede a few days later based on some crackpot theory about the election being stolen. I mean, he seems to believe whatever conspiracy theories his Twitter followers tell him about.
Seriously?
Trump will respect the political process in the unlikely event that Untrustworthy Lyin' Crooked Hillary wins the election.
Sure, if by "respect the political process" you mean "inciting violence and sedition".
The look on his face when he gets perp walked on sedition charges will be priceless though. I just hope Clinton doesn't let him off (the way Obama let off the Bush administration crooks) out of fear for what his Trumpshirt followers will do.