Barack Obama makes his first campaign visit today to his alma mater, Columbia University. Just don't ask the prolific self-diarist to talk about his undergraduate days in Morningside Heights.

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...