A lawsuit has been filed in Oklahoma seeking to block the funding of what could become the first religious charter school in the United States.

The legal challenge centers around the St. Isidore of Seville Catholic Virtual School.

The school was approved by Oklahoma’s Virtual Charter School Board in June. However, state statutes require charter schools to be nonsectarian in their operations. Many experts argue that such a school is also forbidden by the U.S. Constitution as charter schools receive public funding.

Such a case would almost certainly be argued at the federal level potentially reaching the U.S. Supreme Court. The case was brought by a group of parents, education activists, and even clergy who argue that St. Isidore’s creation violates several laws and could lead to discrimination against students of different faiths.