Obama transferred to CC from Occidental College which (poor place) is mentioned even less frequently by the young senator. Obama also tends to forget/ignore his Columbia affiliation, preferring to mention the fact he attended Harvard's law school. While at Columbia, he lived off campus, spent most of his time in Butler, and made few friends. According to his Myspace profile, he majored in PoliSci, with a minor in "International Relations," a designation which does not exist at Columbia.
During his time at CC, Obama was apparently accused of assault by a black woman. The case remained in the student disciplinary system, never making it to court. The outcome is unknown.