Banning Chick-fil-A from opening a new store in Chicago would be an "open and shut" discrimination case. That's according to a number of legal experts, including the ACLU, which "strongly supports" same-sex marriage. One legal professor at George Washing University Law School said Ald. Joe Moreno's concerns against the chicken chain "raises 'serious' constitutional concerns" and that it's a "slippery slope." It was added that denying the business permits based on CFA president Dan Cathy's comments would "absolutely violate the First Amendment."