There are no links or traces back to him, in any of the scandals, nor are there likely to be.
http://www.americanthinker.com/2013/06/the_smoking_gun_in_plain_sight.html
Zero hasn't closed all the doors and windows that he thought he had. While he went around spending upwards of $2 Million to seal HIS vital records, he left other avenues open to public view.
Currently, these windows have included public records pertaining to his father, his mother, his grandmother and now, his "classmates and professor" at Columbia. The more of these records that are discovered and the more people speak up such as the Columbia Poli Sci prof, the more smoke is generated. And, with smoke, there is eventually fire.
Zero has only 10 fingers and 10 toes and can only plug so many holes in the dike. Even one of his senior advisors, David Axelrod, has acknowledged that the government is too big. Right now, they are offering up small fry to take the fall for Obama. But, sooner or later, one of them will refuse to "take one for the team" and will tell how many bodies there are between him and Obama. People like to talk and people have strong survival instincts.
It's only a matter of time. Meanwhile, zero feels the walls closing in on him.