(TEXAS TRIBUNE) - Four professors and a national faculty group asked a federal judge Monday to block the Texas A&M University System's restrictions on teaching about race, gender and sexuality and to reinstate courses canceled under the policy.

The university system bars professors from "advocating" race or gender ideology or topics related to sexual orientation or gender identity.

It requires presidential approval to address those subjects in certain courses and, according to the lawsuit, prohibits them in core courses.