The Democrat and Republican professional political class been predicting it since last July, so its gotta happen soon or it wont matter.
Trump will have the nomination before his campaign can collapse.
So, any day now.....
Well they've been thin-slicing his lead by laser-pointed ads in very localized areas to keep the content off the radar of the national media stations. I believe the radio ads in SC and robo calls had Trump shaking in his boots. If they went national with the content of those ads, they'd have Trump completely obliterated overnight. But they've thrown the dice against the wall and decided to keep on the down low about the topic state by state. Their top strategic adviser doesn't want the truth about the topic to get out: how few people support it in truth....and how many of those people make up Trump's devoted followers.
And no, the topic isn't jobs or illegal immigrants. The less the GOP talks about the topic openly, the more Trumpsters distrust them and believe the establishment candidates would sweep this important visceral issue under the rug like they did all last year as it was making its way to the US Supreme Court.
You can't really blame the Trumpsters for defecting and staying defected. The conspicuous silence is like a BULL HORN in the pubs, the schoolhouses and the factories...and churches across the nation...
The first is TV ad, but the robo calls had this as their transcript:
"
The announcer says, "Stop! What does she mean by forward motion? What's he agreeing to? It's not about tolerance anymore. It's about mandatory celebration. It's about forcing people to bake cakes and forcing people to photograph gay weddings. Forcing clergy to officiate. It's about transgender bathrooms in your child's school. It's about tearing down our Judeo-Christian values. It's about tearing down our America. " Pro-Cruz SuperPAC Slams Trump For Confederate Flag Removal, Gay Rights
This next video played until recently when the owner made it "private"...but in it, if you can gain access (it was an interview on Fox News the day after SC primary with Donald Trump), you would hear that his extremely subdued, even grieving demeanor here... he even says in this interview that he is now "fighting for his life" after he discussed Cruz's "tough...very tough" last minute robo-calls (see first video here)... Donald Trump himself in this interview alludes as to how fearful he is of the gay marriage topic and how damaging it is to his campaign given his recent past soft stance on it. Cue up to :44-1:12 The "fighting for my life" comment is cued at 2:38-2:53
And finally, Trump's friend on the set of the Apprentice show, George Takei tells it like it is about Trump's actual stance on the issue. Trump calls gay marriage beautiful and that Trump actually supports gay marriage but will say anything to his "base" to get elected..
Cue 1:14-1:58 (Trump calls gay marriage "beautiful") .....& ...(where Takai says Trump supports gay marriage but will say anything to get elected) > 3:59- 5:19....