Attorney Joanie Rae Wimmer, cited as the inspiration for a transphobic Ives campaign ad, says the politician is "demonizing a group of people."
Republican Jeanne Ives's ad features a caricatured "transgender" person (pictured), among other offensive portrayals.
Arthur Jones, who is racist, anti-Semitic, anti-LGBT, and a Holocaust denier, has no opponent in the Republican primary.
A transgender girl in suburban Chicago said requiring her to use a privacy stall in the girls' locker room was discriminatory.
No harm has come to anyone by allowing trans students access to facilities appropriate for their gender identity, the judge rules.
It is only the second state to ban the defensive tactic from the courtroom.
Illinois — a state with no shortage of problems, from violence to budget impasses — has five LGBT-friendly Democrats vying to lead it.