A federal judge issued a preliminary injunction overriding President Obama's guidelines advising schools to allow transgender students to use facilities that match their gender identity.

U.S. District Judge Reed O'Connor made his ruling on Sunday in response to lawsuits filed by Texas and other states.

In May, the President and the Department of Education declared that Title IX protections required schools receiving federal funding to not discriminate against trans students. O'Connor's order means that, until the lawsuit works its way through the courts, Obama's directive is not enforceable.

He justified the injunction because he felt there is a strong likelihood the states will win their case. O'Connor wrote that, in his mind, Title IX does not cover gender identity.

"[I]t cannot be disputed that the plain meaning of the term 'sex' as used... following passage of Title IX meant the biological and anatomical differences between male and female students as determined at their birth."

He also found that the Administration didn't allow for any comment on the guidelines.

In a joint statement, five civil rights groups—including Lambda Legal and the ACLU—vowed to continue the fight.

“A ruling by a single judge in one circuit cannot and does not undo the years of clear legal precedent nationwide establishing that transgender students have the right to go to school without being singled out for discrimination," it read.

“We will continue to file lawsuits representing transgender students and litigate them to the fullest extent of the law—regardless of what happens with this particular federal guidance.”