f Trump does not have 1237 delegates by the Convention, his probability of being blocked there goes up exponentially.
Trump's biggest problem is his mouth and caustic attitude. Traditionally, a front-runner (who has an automatic built-in advantage already) keeps his nose clean and doesn't piss many people off. That way, if he happens to end up in a brokered convention, he can usually rally support from some of the uncommitted delegates on the second ballot. But Trump has burned all bridges not leading to Trump. Instead of trying to unite the party or bring support over to his side, he chose to smear and slime his opponents and insult their supporters. That's going to cost him big time.
Now maybe we'll all get to see some of this phenomenal deal-making prowess in action and he can finagle the delegates he needs to win? But I am thinking, the establishment now sees the ONLY option they have of blocking Trump is to back Cruz. They don't want to... but they don't want Trump. So we'll have to hear all the Trump Dummies parade around claiming Cruz is "establishment" when everyone knows he isn't. But that's how Trump will play it and he'll hope that some of the stupid rubs off on Kasich and Rubio delegates.
No matter what Hillary Clinton is going to win the White House. Neither Trump nor Cruz can. The Republican Party is shattered into pieces, and there's no putting it back together for the general
The very worst thing that could happen is for the Republican party to put up a new face. It may mean disaster, but this party has been dragged so far right by one issue abortion voters, (Evangelicals) that were the reason Romney lost in 2012. They chased off women by double digits, younger women by 36 points which is what secured a 2nd term for Obama. In 2016, it's Hispanics or 17% of the population that are now solidly in Hillary Clinton's column. This when the GOP nominee needed 46% of this block to win. Trump is polling at a negative 80%.
Why Romney Lost And Republicans Keep Losing
The GOP's woman problem goes beyond Trump
GOP Win Will Need More Than 40 Percent Of Latino 2016 Vote, Says Study
Poll: 75% of Latinos Have Negative View of Donald Trump
If Republicans put up a new face, these same people will not learn a dam thing. They'll just say Republicans didn't win because the nominee wasn't Trump or Cruz. They'll turn on their right wing talk show hosts, and start the process all over again for another loss in 2020. So it's best to just step aside and let it happen.