WASHINGTON–Supreme Court nominee Elena Kagan as a college student had a deep interest in Socialism and wrote her Princeton undergraduate thesis about the Socialist movement in New York and why it never endured. The thesis and much more are now on file with the Senate Judiciary Committee in advance of her confirmation hearings sometimes this summer. Also: Kagan has a $1.7 net worth, most of her assets are in cash, she has no substantial investment, no credit card debt, no car, no mortgage. These details and more about Kagan’s answers to Senate questions are in a column I co-wrote here.