Charles Johnson at LittleGreenFootballs has an overview of Obama's skeletons:
* Rabidly anti-Israel Columbia University professor Rashid Khalidi. The Obamas were regular dinner guests at Khalidi’s Hyde Park home for years.
* Terrorist sympathizer Ali Abunimah, who runs the viciously anti-Israel web site Electronic Intifada.
* Unrepentant Weather Underground terrorists William Ayers and Bernadine Dohrn.
* Reverend Jeremiah Wright. What more needs to be said?
* Anti-Israel foreign policy adviser Samantha Power — fired after calling Hillary Clinton a “monster.”
* Anti-Israel foreign policy adviser Robert Malley — fired when it was revealed he has been holding talks with Hamas.
* Hatem El-Hady, former official of the Hamas-linked charity Kindhearts, closed by the Justice Department. El-Hady’s web page suddenly vanished from the Obama campaign site with no explanation, after being exposed by LGF and others.
* Tony Rezko — a Chicago fixer currently in a whole lot of legal trouble.
There are more, I know; this is just off the top of my head.
I have never witnessed a presidential election in which a major candidate had this many skeletons in his closet.