A public interest group has sued in federal court to abolish an Illinois rule requiring pharmacies to fill prescriptions for emergency contraception, a new legal attack on a mandate some pharmacists say is unconstitutional.

The Washington-based American Center for Legal Justice, a group founded by evangelist Pat Robertson, filed the lawsuit Monday in federal court in Springfield, Ill. While it mirrors some claims in lawsuits filed in state court challenging the rule, it is the first federal lawsuit, said the group’s senior counsel, Frank Manion.