If he did then so did cruz
According to the first paragraph of the above article:
“So that’s why Cruz won’t give a straight answer when he’s asked if he’ll break his pledge over Trump insulting his wife. It’s not about proving he’s a “man of his word.” It’s because, as usual, he’s well-versed in the rules and Trump isn’t.”
Wrong. Cruz did NOT say he will not support the GOP nominee. Cruz actually said this: “I don’t make it a habit to support people who attack my family”. He left himself room to still support Trump if he wins. He could say, well I don’t make it a habit to support people who attack my family, but in this instance, when the alternative is Hillary Clinton, I will make an exception.