The public at large has barely paid attention (although more so than most primaries).

Here's just a quick list of questions that he will have to answer in the general that he doesn't talk much about in the primary.

Abortion.  Okay to nine months?  But you said so in your speech to the Illinois state legislature.

Nuclear power?  You are for it?  Then why won't you open Yucca mountain?

Rezko?  Why did you (in effect) accept a $300,000 loan from him?

You said you will leave Iraq, pretty much, no matter what.  

What if severe violence erupts?  What if we are asked to stay?  What if Iran openly interferes?

Will you do away with Nafta?  Or other trade agreements?  Convince us that it has much to do with our job losses.

That's just a few among many that he hasn't had a critical audience in the Democratic primary.