More than 150 professors have signed a letter opposing the union drive, which cites concerns about the potential for national union interference in affairs at Urbana-Champaign, and the fact that state law would make membership in the form of representation and — if the union required them — dues mandatory for all faculty, whether they supported the union or not.

 

http://www.insidehighered.com/news/2014/02/21/u-illinois-urbana-champaign-faculty-watch-strike-chicago-campus-closely