I agree with Dragonfly here. Now is not the time to rub salt in the wounds of Republicans. Yes, they poured gasoline over their entire party structure and then lit a match, but it's not like Democrats are in a better position. It's 2010 for the Democrats. The power structure of the party has been absurdly re-positioned to a particular group within the party and it's drowning out all other voices. The Republicans and Democrats have been slowly taking a jack-hammer at their fault lines of their different coalitions.
The result? The party coalitions are no longer willing to work with each other, and people have been forced to ask "Why did they do this?" The answer, of course, is that they needed to give undue power to the coalitions that supported their donor class' neoliberal capitalist vision of America. The result, particularly on the Democratic side but you're really starting to see it on the Republican side (e.g. how Cruz took Colorado), is that in order to try to keep the status quo, they've had to exert (as I predicted on this forum 5 months ago) a shocking number of tactics that can't be veiled anymore. And it's exposed massive corruption, many openly anti-democratic policies are now widely known, and I would honestly say at this point in time, the likelihood that the Democratic party cleanly takes the 2016 presidency is more and more hazy.
As I see it, this is what's going to happen: Sanders likely will lose (I'll fight with him to the end, and I have no intention of voting for Hillary; the deck was stacked so high against him it was beyond what any of us imagined), and that will fragment the Democratic party very seriously. But, the Republican party is clearly going to have a contested convention, and, yes, the RNC will broker the convention for Kasich. Now Trump supporters and Sanders supporters have nowhere to go. That means that there will be a third party candidate like Nader or Perot. I honestly don't know if Trump will go third party, we'll see, but I'd make a pretty massive bet that he won't survive a contested convention (which is where he's headed).
One thing I can tell you is that the whole thing is turning into a **** show.
I like this article on this topic.