How did Thomas Caplan and Bill Clinton become friends?

y virtue of the alphabet, Bill Clinton and I were assigned rooms a few doors from each other on the second floor of Loyola Hall. We met at a corridor meeting that evening and there began a friendship that led to our being roommates a few years later and that has remained uninterrupted, even by a single memorable argument, to this day. http://www.huffingtonpost.com/thomas-caplan/bill-clinton-thriller-reader_b_1196463.html