Agreed, he needs to come out and endorse Cruz. It would be far more honest than this playing coy. It is obvious to everyone who he is for.
Rush wants to maintain his audience. If Rush endorses anyone during the primaries, he knows how much of his audience he’d lose.
Don’t hold your breath. Only Cruz supporters think Cruz has a chance to win the General. No one else does. Levin and Rush won’t risk their careers with the primaries yet to be decided.