Actually, I recall a story that appeared a few months after the Big Zero became president, in which a journalist tried to find Columbia classmates of his.
The journalist went through the alumni directory, and contacted those who would've been at Columbia the same time as the Big Zero.
Columbia University's big, but remember, the Big Zero was engaged in law studies (or pre-law) there, and that involved a much smaller number of students, nearly all of whom would be taking the same classes, having the same professors, hanging around at about the same time.
And remember the Big Zero's, uh, coloration.
Someone likely to "stick out" in the group.
Anyway, the journalist couldn't find anyone who ever remembered the Big Zero actually being at Columbia.
It was remarkable; the Big Zero was by then president, and one thinks those associated with him would recall him.
None did. Not a single one.
I wish I had a link, but I'm lousy at record-keeping. Sorry.