Baloney.
As others have pointed out, if several candidates are bunched together at a relatively low delegate count, even if one is leading by a few percent, a brokered convention is the right thing to do. If the leading candidate’should has under 35%, then TWO-THIRDS OF REPUBLICANS HAVE VOTED AGAINST HIM! Whether the leading candidate is trump, or Sen. Cruz, or Bush or Rubio, why should such a small plurality entitle him to the nomination?
In that case, the nomination needs to go to a candidate who can work out a compromise that win the support of a majority of the convention delegates.
If, on the other hand, if a candidate walks into a fractured convention with 40% or 45% of the vote, with the most delegates, but barely short of a majority, he will be the candidate with the best position in the negotiations for the nomination. If such a candidate wanted the nomination for himself, he would be the candidate with the easiest path to getting to 50% + 1 of the delegates to win the nomination.
The entire system stinks. Followup votes of the TOP TWO is the only way to faultlessly resolve a lack of majority votes. And sending signals to the ‘G’ OP that you’re ‘in’ is a nasty, questionable thing to do. Very poor judgment. Good judgment is a challenge for Team Cruz just like it is for everyone.