The more deeply I look into the rules governing the allocation of delegates in Republican primaries [I shall spare you the details -- each state is different!], the clearer it becomes to me that in a crowded field, a front-runner pulling 30-35% of the vote is likely to win as many as two-thirds or more of the delegates. This markedly improves Trump's chances of securing the 1243 delegates needed for the nomination even without any of the 619 "super-delegates" voting for him. If Trump does not nose-dive, which looks less and less likely as time goes by, the rag-tag collection of big-wigs known as "The Republican Establishment" is going to become more and more desperate as February turns into March and March approaches April. We may soon be looking at the death of the Republican Party as we have known it since 1968 and Nixon's Southern Strategy.
People who want to explore the rules for each state primary or caucus can find them here on something called "The Green Papers."