That is incorrect, Cruz was praying personally with the Wife of the Christian Pastor long before the Iran deal was announced./ No he was not the only one, Franklin Graham to name a few.
No reports of Trump praying for him
No, that's true, but he kept pounding the hell out of that whole hostage problem, and threaten Iran to boot.
It appears you think that had nothing to do with it, but as with The Wall, it wouldn't be anywhere in the news except for trump.