Novak's knowledge of Clinton Campaign Dirt on Obama

I wonder what it is he supposedly has. 

Does he really have it?

What might it be, if she does have something "on" Obama?

Like Mary Katherine Ham said on Reliable Sources Sunday Morning, Novak hasn't made his name in DC Politics by going public with unreliable information.  Where there is smoke, there is likely fire. 

I don't think the last of this has been heard.