The source for the 2.6 number is a successful Silicon Valley entrepreneur and a Columbia alumnus who maintains good ties with the university. In 2004, after Obama’s successful speech at that year’s Democratic convention, a Columbia University official told him Barack Obama’s GPA, he explained to TheDC. “This person told me that he [Obama] was a pre-law, poli-sci major, had a lot of incompletes, and as best could be determined after sorting through the incompletes, had a GPA of 2.6,” said the businessman, a former Marine Corps combat veteran. Read more: http://dailycaller.com/2012/11/02/wealthy-columbia-univ-donor-school-told-me-obama-had-2-6-gpa/#ixzz2BEZxKtdn