Wes Vernon at Renew America has written a connect-the-dots article on Obama's mentors, business associates, and friends, who for some reason the MSM refuses to vet or bring to light for the American public.
Vernon's details can only be taken with a grain of salt as they are not proven, nor unproven. Some of them are common knowledge to those who have been following the Obama story for some time.
Mentioned are William Ayers and Bernadine Dohrn both of the Weathermen Underground and Alice Palmer who has her own checkered file and helped Obama use Chicago style tactics to get all other Dem candidates off the Ballot so he ran unopposed in 1996. These are just a few of the connections named in this article.