Suit challenging Ohio State U gun ban
Complaint here. It's brought by Students for Concealed Carry and Ohioans for Concealed Carry. The campus code forbids possession of firearms or ammunition "even if otherwise permitted by law," plus placing other restrictions upon possession (interestingly, the code for residence halls also prohibits possession of knives, airsoft guns, "paint guns," darts, and tasers, and extends the ban to areas near the residence halls).
While there is a constitutional challenge, it sounds as if the statutory points will suffice: from what the complaint alleges, Ohio has some pre-emption statutes, including one specifically saying that public colleges cannot prohibit a CCW licensee from having a firearm in a locked vehicle, and restricting the colleges regulating matters off their actual property.