I think Donald has more true love, which ameliorates the effect of the enmity. He will defend against pot shots from Cruz, but absent that, has no real reason to expend energy mowing Cruz down.
Having actual support split between Bernie and Hillary, though, looks like it bodes to hobble the Donks but good. We won’t even see faces; we’ll see nothing but slung mud.
I have a couple quick reactions to that, first, November is a long way off. But more importantly, Hillary is a deeply flawed candidate. The DEMs path to unity lies in replacing her with a different candidate.