Information for Prospective Visiting Graduate Students Ph.D. candidates in political science may be sponsored by the department to visit Columbia as Special Non-Degree students in the Graduate School of Arts and Sciences or as Visiting Ph.D. Scholars. Click here for information about both arrangements. Preliminary inquiries should be directed to the Graduate Program Coordinator. In most cases, students and scholars do not require Visiting Scholar status to access Columbia libraries. Please consult the Library Information Office for details about Columbia libraries access for non-affiliates. Information about visiting for prospective students, groups, and tourists is available here.