Cruz was on with Levin at the bottom of the 2nd hour tonight and they discussed all of this directly. HarleyLady27 probably missed it, though.
I heard the entire show.
To suggest that Levin and Cruz "discussed all of this already" is a stretch that borders on a complete misrepresentation.
They talked about Cruz's plans for Jihadi immigration, and his feeble attempts to make a show of restricting it. And, the "unfair" Rubio attacks.
Never once did either of them mention the merits of Trump's proposal.
It was pretty much avoided.