A controversial immigration debate at the University of Chicago Law School this week has been indefinitely postponed by student organizers citing an “unacceptably high risk of serious disturbance.”

The law school’s Edmund Burke Society—which bills itself as a “conservative parliamentary debating society”—touched off a campus outcry last week when it invited students to the Feb. 6 debate dubbed “Resolved: Raise the Bar” with a so-called whip sheet that many found offensive. The whip sheet was intended to serve as a call to Edmund Burke Society members to participate in the event.