No, they don't. Please remember that Newt Gingrich was a big supporter of the “Criminal Safezones Act” which prevents armed citizens from defending themselves in certain arbitrary locations.
I prefer a more common sense approach: “There are already guns on campus. All too often they are illegal,” Republican Gov. Rick Perry said. “I want there to be legal guns on campus”
Disclaimer: Perry's statement is not in response to today's shooting. It's always been his stance.
No reports yet on cop’s condition; just saw a report of a possible second victim.