Graduate students and professors at the University of Illinois no longer need worry that a bumper sticker supporting John McCain â?? or Barack Obama or Ralph Nader or anyone else, for that matter â?? puts them in violation of the stateâ??s ethics law, the university systemâ??s president, B. Joseph White, said in an e-mail message to faculty and staff members this afternoon. The university will â??preserve, protect, and defendâ? the constitutional freedoms of speech and assembly of every employee, as well as academic freedom, he wrote.