http://countusout.wordpress.com/2008/09/11/obama-covers-his-tracks/
The Columbia years are a hole in the sprawling Obama hagiography. In his two published memoirs, the 47-year-old Democratic nominee barely mentions his experience there. He refuses to answer questions about Columbia and New York — which, in this media age, serves only to raise more of them. Why not release his Columbia transcript? Why has his senior essay gone missing? [....]
Voters and the media are now exercising due diligence before Election Day, and they are meeting resistance from Mr. Obama in checking his past. Earlier this year, the AP tracked down Mr. Obama’s New York-era roommate, “Sadik,” in Seattle after the campaign refused to reveal his name. Sohale Siddiqi, his real name, confirmed Mr. Obama’s account that he turned serious in New York and “stopped getting high.” “We were both very lost,” Mr. Siddiqi said. “We were both alienated, although he might not put it that way. He arrived disheveled and without a place to stay.” For some reason the Obama camp wanted this to stay out of public view.
What can be said with some certainty is that Mr. Obama lived off campus while at Columbia in 1981-83 and made few friends. Fox News contacted some 400 of his classmates and found no one who remembered him.
And if he had had any kind of reasonable GPA he would have had a free ride to postgrad admission somewhere, so he probably graduated with similar distinction to McCain - almost at the bottom of his class.