Cruz is a junior Senator. He has a lot of time to get more experience under his belt and make another go at it. That’s a positive thing, btw :)
I think if Cruz doesn’t throw it away, he’ll be VP. I don’t agree he has to attack Trump, he should let it play out. If Trump stays on top, he’s in somehow, if Trump goes, he’s in good position.
But if he goes after Trump, that kills both scenarios because he won’t walk away unscathed.