Regarding Hillary & Sanders, the fact that there is one last primary after tonight (DC next Tuesday) give the perfect amount of time for a cooling off period. I don't expect Sanders to concede tonight or tomorrow. He may still put out defiant statements. No need to get into a back and forth with the man. Here's how I'd like to see this play out:
1) Hillary declares victory tonight, makes note of historic aspect of her candidacy, thanks Sanders for pushing the envelope and rips Trump a new one once again. Nothing about how Sanders should quit immediately, but a blurb about party unity will be nice. Also mention that DC deserves the right to have their voices heard/
2) Hillary lines up all Super Delegates, including some who are already pledged to Sanders. This snuffs out any notion of getting Supers to switch to Sanders.
3) Get endorsements planned and rolled out in an orderly fashion. #1 is Obama. #2 is Warren. I'd also have them announce either this week or maybe after DC is done.
Sanders can figure out his own endgame, but if you have Warren's endorsement in your corner as well as all Supers accounted for he has no avenue for mayhem. Let him write the party platform if that keeps him happy. He's earned that much.