This was a small minded man’s childish effort to hijack the convention for himself.
The MSM story meme is set is was instantly “disaster” and this am it is all about cruz’s hissy fit.
I'm thinking this will backfire and actually help Trump achieve a mandate victory in November.
Sure, the Democrats are crowing about Republican "disunity" today but that implied disunity will make it much easier for Democrats, who are not exactly thrilled with another Clinton, to pull that Republican lever for Trump.
Think about it. Most Democrats would rather walk over hot coals than to vote for a Republican. Many of us feel the same way about voting Democrat. But because of the fact that much of the Republican establishment is throwing a hissy fit over Trump (not just Cruz but the Bushes, Romney, Kasich, etc.), many Democrats will actually feel like they are giving the GOP a "poke in the eye" by voting for Trump. They won't feel like traitors to their party.
It would be the same for us if the shoe was on the other foot. Let's say that Trump ran as a Democrat and beat Crooked Hillary for the nomination. And we nominated Jeb Bush. What would we do? Especially if we knew that voting for Trump would cause establishment Democrats to rend their clothing and kick and scream.