I could be very wrong, but it seems to me Levin is doing his listeners a disservice. As the leading constitutionalist on the air, he could explain this comprehensively yet concisely. From what I have heard of him on the matter, it sounds to me like he doesn't even want to touch it.
Again, I have not heard every hour, or every show. so I could be wrong.
I think you are right. From what I have heard on his show he has given the eligibility issue short shrift, but I bet he will weigh in on Obama’s failure to appear.
I don’t get to listen to him very often I’m too busy. But, I have enough respect for hm to believe he must have his reasons.