Unless the pair became running mates. Cruz as Robin to Trump’s Batman. Trump has been documented as a good listener.
Cruz is a believer, it is overt. Fault him for pride maybe, but not for never accepting Christ.
Trump is almost all about his now troubled and liberal mainline church, when he addresses the subject at all. No idea where he is with Christ, though I think there is cognitive dissonance between that church and positions he has taken. He might be remembering his childhood Presbyterian church fondly, which was more conservative. Sometimes childhood faith is more honest.
I agree with you about Trump's relationship with Christ. Nothing is clear except what he says. Who am I to judge?