(WPXI) – A judge has denied the motion for a temporary restraining order in federal court Monday after a group of parents wanted the Canon-McMillan School District to require masks. Classes resumed last week and masks are optional right now. The lawsuit asked a judge to require students and staff to wear masks. Parents of some students say that with how the delta variant is spreading, masks should be mandatory. The attorney representing the parents was successful in obtaining a temporary restraining order in the North Allegheny School District that made masks mandatory. The district reverted back to an optional policy, according to the attorney, just days before the start of the school year and by then, parents had missed the deadline for alternative educational programs like learning from home.