Most of the Cruz votes are anti-establishment votes. A reasonable fraction of these would go to Trump and give him the 1237 he needs for the nomination outright if Cruz weren't running in a race that (unlike Trump) he has 0 chance of winning. People are "going nuts" because the outcome of Cruz's candidacy will be to deny Trump the nomination, handing the RNC the brokered convention that it wants, and the nomination of Jeb, Paul, Mitt, or Marco.
If there was an actual chance that Cruz could get delegates he needed outright, he could at least say that he's running to win as opposed to running out of spite or in the RNC's service. Unfortunately, the latter two options are much more likely.
People are “going nuts” because the outcome of Cruz’s candidacy will be to deny Trump the nomination, handing the RNC the brokered convention that it wants, and the nomination of Jeb, Paul, Mitt, or Marco.
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We were not talking about Cruz’s candidacy. We were talking about the second vote at a contested convention. You said that it doesn’t matter who the delegates support, because they will only vote how they are instructed by the RNC. So, the RNC will get to pick their own candidate on the second ballot.
I say that is a bunch of crap. Most of them will vote for candidate they support. I agree, some will be pressured, but lining up delegates that support you matters.